• obsolete germ-line cells
  • Z2
  • Germ line precursor cell
  • Z3
  • Germ line precursor cell
  • Psub4
  • Embryonic founder cell of germ line
  • gonadal sheath cell
  • five pairs of thin gonadal sheath cells form a single layer covering the germ line component of each arm, each pair occupying a stereotyped position along the gonad proximal-distal axis.
  • gon_male_dtc anterior
  • Distal tip cell, inhibits meiosis in nearby germ cells, anterior
  • gon_male_dtc posterior
  • Distal tip cell, inhibits meiosis in nearby germ cells, posterior.
  • anterior distal tip cell
  • Anterior distal tip cell, inhibit meiosis in neighbouring germ cells, lead gonad during morphogenesis, herm gonad
  • posterior distal tip cell
  • Posterior distal tip cell, inhibit meiosis in neighbouring germ cells, lead gonad during morphogenesis, herm gonad
  • germ line
  • cell line which early in development becomes differentiated from the remaining somatic cell line, and alone has the potential to undergo meiosis and form gametes.
  • dorsal nerve cord
  • a bundle of nerve processes that runs along the dorsal mid-line of the animal.
  • polar body
  • One of two small cells produced, each during one of the two meiotic cell divisions, which are then discarded in the creation of the haploid germ cell.
  • sperm
  • Male haploid germ cell.
  • oocyte
  • a female haploid germ cell.
  • ventral nerve cord
  • a large process bundle that runs along the vental mid-line extending from the ventral region of the nerve ring.
  • secondary spermatocyte
  • A haploid immature germ cell which forms in the gonad by the division of a diploid primary spermatocyte. It undergoes a second meiotic division to complete meiosis, at which time the daughter cells detach from the residual body to become spermatids.
  • germline blastomere
  • Embryonic cell that has the developmental potential to generate a germ cell.
  • ganglion
  • A cluster of nerve cells and associated glial cells (nuclear location).
  • e2DR
  • Pharyngeal epithelial cells
  • e1D
  • Pharyngeal epithelial cells
  • e2V
  • Pharyngeal epithelial cells
  • e3VL
  • Pharyngeal epithelial cells
  • e2DL
  • Pharyngeal epithelial cells
  • e3D
  • Pharyngeal epithelial cells
  • e3VR
  • Pharyngeal epithelial cells
  • e1VL
  • Pharyngeal epithelial cells
  • e1VR
  • Pharyngeal epithelial cells
  • accessory cell
  • cells that support sensory neurons, similar to glial cells in vertebrates. A category which collectively refers to socket cells, sheath cells, and structural cells, or their processes. All of these cells extend long processes which serve a supporting role, rather like glia, to form a protective environment around sensory neuron endings. In addition, some of these cells extend broad thin processes from their somata which wrap around neuronal ganglia, again in a glia-like fashion
  • vas deferens precursor
  • blast cell that divides to become mostly vas deferens cells (and a few seminal vesicle cells).
  • epithelial cell
  • cell of epithelium, the layer of cells that cover the external surface of an organism as well as forming an inner lining between the tissues and organs of that organism and the external environment. In C. elegans epithelial cells include epithelium of the alimentary tract, intestinal cells, hypodermis, interfacial cells and somatic gonad cells.
  • obsolete AB.a lineage
  • cells in the AB.a lineage
  • obsolete AB.p lineage
  • cells in the AB.p lineage
  • uterine rho cell
  • any of six ventral uterine intermediate precursor cells that are not directly adjacent to the anchor cell and whose progeny are fated to become uterine cells other than uv1 and utse cells.
  • uterine toroidal epithelial cell
  • toroidal epithelial cell that make up the bulk of the uterus, four cells anterior and four cells posterior to the vulva.
  • MCR
  • Pharyngeal neurons that synapse onto marginal cells
  • MCL
  • Pharyngeal neurons that synapse onto marginal cells
  • obsolete VPC
  • six vulval precursor cells in early L3
  • obsolete Cell_group
  • a group of cells that have shared characteristics
  • hermaphrodite alae seam cell
  • post-embryonic seam cells that make alae, hermaphrodite.
  • hermaphrodite-specific anatomical entity
  • cells or anatomical parts specific to the hermaphrodite sex
  • male-specific anatomical entity
  • cells or anatomical parts specific to the male sex
  • R4
  • Precursor of cells that form male sensory ray 4.
  • R5
  • Precursor of cells that form male sensory ray 5.
  • R6
  • Precursor of cells that form male sensory ray 6.
  • TL.appa hermaphrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree TL.appa.
  • V2R.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V2R.ppppp.
  • extracellular component
  • Anatomical structures that exist outside of cells; non-cellular.
  • R8
  • Precursor of cells that form male sensory ray 8.
  • R9
  • Precursor of cells that form male sensory ray 9.
  • uv2
  • uterine-vulval cell, medial position of three ut cells.
  • V1R.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V1R.pappp.
  • R2
  • Precursor of cells that form male sensory ray 2.
  • R3
  • Precursor of cells that form male sensory ray 3.
  • R7
  • Precursor of cells that form male sensory ray 7.
  • TR.appa hermaphrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree TR.appa.
  • V1R.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V1R.ppppp.
  • V2L.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V2L.pappp.
  • V2L.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V2L.ppppp.
  • V5L.ppppp hermaphrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree V5L.ppppp.
  • V6L.ppppp hermaphrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree V6L.ppppp.
  • V6R.ppppp hermaphrodite
  • Postembryonic seam hypodermal cells, make alae of pedigree V6R.ppppp.
  • Functional system
  • concerns with functional aspects of cells and anatomical parts
  • H1L.appp
  • Postembryonic seam hypodermal cells, make alae; of pedigree H1L.appp.
  • H1R.appp
  • Postembryonic seam hypodermal cells, make alae; of pedigree H1R.appp.
  • H2R.pppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree H2R.pppp
  • R1
  • Precursor of cells that form male sensory ray 1.
  • V1L.ppppp
  • Postembryonic seam hypodermal cells, make alae; pf pedigree V1L.ppppp.
  • V2R.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V2R.pappp.
  • V3L.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V3L.ppppp.
  • V3R.pappp
  • Postembryonic seam hypodermal cells, make alae, of pedigree V3R.pappp.
  • V3R.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V3R.ppppp.
  • V4L.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V4L.pappp.
  • V6R.pappp hermaphrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree V6R.pappp.
  • anterior gonadal sheath cell
  • any of sheath cells of the anterior gonad arm.
  • H1L.aa
  • Postembryonic seam hypodermal cells, make alae; of pedigree H1L.aa.
  • H1R.aa
  • Postembryonic seam hypodermal cells, make alae; of pedigree H1R.aa.
  • H2L.pppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree H2L.pppp.
  • sensillum
  • sensory organ, consists of sensory neurons and supporting cells.
  • V1L.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V1L.pappp.
  • V3L.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V3L.pappp.
  • V4L.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V4L.ppppp.
  • V4R.pappp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V4R.pappp.
  • V4R.ppppp
  • Postembryonic seam hypodermal cells, make alae; of pedigree V4R.ppppp.
  • V5R.ppppp hermaphrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree V5R.ppppp.
  • V6L.pappp hermaprhrodite
  • Postembryonic seam hypodermal cells, make alae; of pedigree V6L.pappp.
  • uterine pi cell
  • any of six ventral uterine intermediate precursor cells that are adjacent to the anchor cell and whose progeny are fated to become uv1 and utse cells.
  • W cell
  • Postembryonic neuroblast, analogous to Pn.a cells, also known as P0.
  • rect_VL
  • Rectal epithelial cells, adjacent to intestino-rectal valve, have microvilli
  • rect_D
  • Rectal epithelial cells, adjacent to intestino-rectal valve, have microvilli
  • se_male
  • post-embryonic seam cells that make alae in the male.
  • rect_VR
  • Rectal epithelial cells, adjacent to intestino-rectal valve, have microvilli
  • sex myoblast
  • Blast cell which divides to product sex-specific muscle cells.
  • CA9
  • Male specific cells in ventral cord, neuron-like but lack synapses.
  • BAGL
  • Neuron, ciliated ending in head, no supporting cells, associated with ILso
  • FLPL
  • Neuron, ciliated ending in head, no supporting cells, associated with ILso
  • BAGR
  • Neuron, ciliated ending in head, no supporting cells, associated with ILso
  • Excretory duct
  • The extracellular sinus formed by the excretory duct and pore cells.
  • uv3
  • uterine-vulva cell, distal (of three ut cells) to the vulva.
  • FLPR
  • Neuron, ciliated ending in head, no supporting cells, associated with ILso
  • pharyngeal muscle cell
  • type of cells that make up muscle layers in the pharynx.
  • Time
  • concerns with temporal aspects of cells and anatomical parts, e.g. development
  • rectal epithelial cell
  • These cells include: B, F, Y, U, K' and K. All rectal epithelial cells contain secretory membrane stacks along this region facing the lumenal cuticle and produce some portion of the cuticular lining of the rectum. These are interfacial cells that connect the alimentary system to the main body syncytium.
  • dorsal uterine precursor cell
  • dorsal uterine precursor cell; generates uterus, spermatheca and spermatheca-uterine valve cells.
  • body wall muscle cell
  • type of 95 cells that make up muscles of the body wall.
  • g1ARP
  • Syncytial g1 gland cell, formed by fusion between g1AR and g1P cells.
  • H cell
  • Head lateral ectoblast which gives rise to hypodermal cells in the head.
  • se seam cell
  • Postembryonic seam hypodermal cells, make alae, found in both male and hermaphrodite.
  • organ
  • a collection of cells or cell groups that collectively perform a function
  • GLR
  • set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons, might be glial cells
  • germline precursor cell
  • member of a set of two cells that generate exclusively sperm and ovum.
  • V5R.pppapp
  • Male V5R.pppapp lineage cell, fuses into postembryonic seam hypodermal cells that makes alae.
  • body region
  • region of the body by which tissues, cells or cell parts are classified
  • V5L.pppapp
  • Male V5L.pppapp lineage cell, fuses into postembryonic seam hypodermal cells that makes alae.
  • ventral uterine precursor cell
  • ventral uterine syncytia precursor cell; generates uterus, spermatheca and spermatheca-uterine valve cells.
  • V cell
  • Ventrolateral ectoblast of the body that gives rise to neurons, hypodermis and seam cells.
  • linker_killer
  • One of these cells, sometimes fused with U.l/ra, phagocytoses the male linker cell
  • AWCR
  • Amphid wing cells, neurons having ciliated sheet-like sensory endings closely associated with amphid sheath
  • AWAL
  • Amphid wing cells, neurons having ciliated sheet-like sensory endings closely associated with amphid sheath
  • AWAR
  • Amphid wing cells, neurons having ciliated sheet-like sensory endings closely associated with amphid sheath
  • AWCL
  • Amphid wing cells, neurons having ciliated sheet-like sensory endings closely associated with amphid sheath
  • male distal tip cell
  • one of a pair of cells, situates at the distal tip of the male gonad.
  • R1_hyp
  • Ray 1 hypodermal cell, fuses with other ray hypodermal cells to form the tail seam.
  • AWBR
  • Amphid wing cells, neurons having ciliated sheet-like sensory endings closely associated with amphid sheath
  • R2_hyp
  • Ray 2 hypodermal cell, fuses with other ray hypodermal cells to form the tail seam
  • pharyngeal-intestinal valve
  • A group of six equivalent cells forms a tightly constructed 'valve' that links the posterior bulb of the pharynx to the anterior four cells of the intestine. These six cells comprise a small epithelial channel with a cuticular lining in continuity with the pharyngeal cuticle and link the lumen of the pharynx to the large lumen of the anterior intestine.
  • AWBL
  • Amphid wing cells, neurons having ciliated sheet-like sensory endings closely associated with amphid sheath
  • Tissue
  • Association of cells with a common embryological origin or pathway and similar structure and function. Usually, cells of a tissue are contiguous at cell membranes and may be of one or more types. Tissues aggregate to form organs.
  • dorsal uterine cell
  • cell forming dorsal epithelium in central region of the uterus; formed by fusion of four cells.
  • intestinal cell
  • any of 20 large epithelial cells which form a tube and are mostly situated as bilaterally symmetric pairs around the tubular lumen. Each of these cell pairs forms an intestinal ring ( II-IX int rings). The most anterior intestinal ring (int ring I), however, is made of four cells. Intestinal cells contain large nuclei with large nucleoli and numerous autofluorescent granules in their cytoplasm.
  • intestine
  • A chain of very large cuboidal cells forming a wide central lumen in which food arrives from the posterior pharynx, is digested, and from which waste products proceed to the rectum. Intestinal rings form in groups of two and four cells surrounding the common lumen; thus the epithelium is only one cell deep at any point, with neighboring cells firmly secured to their neighbors by apical adherens junctions. These cells have very large nuclei and many large vacuoles, yolk granules, and other inclusions; the latter increase in number and electron density as the animal ages.
  • AWA
  • Neuron class of two ciliated neurons that are associated with the sheath cells of the amphid sensilla.
  • P11/12L
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P3/4R
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P7/8R
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • R3_hyp
  • Male sensory ray 3 hypodermal cell, fuses with other ray hypodermal cells to form the tail seam
  • R5_hyp
  • Male sensory ray 5 hypodermal cell, fuses with other ray hypodermal cells to form the tail seam
  • P3/4L
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P7/8L
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P1/2L
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P5/6R
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P11
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P11/12R
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P5/6L
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P1/2R
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • P12
  • Postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1
  • R4_hyp
  • Male sensory ray 4 hypodermal cell, fuses with other ray hypodermal cells to form the tail seam
  • primary spermatocyte
  • A diploid immature germ cell which forms in the gonad when a spermatogonial stem cell buds off from the rachis to form a single cell that quickly enters metaphase I and divides to form secondary spermatocytes attached to a residual body.
  • Anatomy
  • entity of anatomical origin that is either entirely acellular or is a collection of cells and acellular parts.
  • vas deferens elongated cell region
  • a region of vas deferens, positioned posterior to the cuboidal cell region, formed by cells of elongated morphology.
  • blastopore
  • A hole in the ventral/posterior side of the embryo caused by the inward flow of cells during gastrulation.
  • gonadal primordium
  • a region around premature germline, consists of cells of pedigree Z1 and Z4, which develops to become the somatic gonad.
  • body wall
  • exterior tube of two concentric tubes that make up the body, includes the epidermal cells and the attached neurons and muscles.
  • head muscle
  • body wall muscle in the head, including first eight cells of each muscle quadrants which are innervated by nerve ring neurons.
  • In.a nucleus
  • Postembryonic intestinal cell nucleus, the anterior one from nuclear division of any of 10-14 cells in mid-section of intestine.
  • In.p nucleus
  • Postembryonic intestinal cell nucleus, the posterior one from nuclear division of any of 10-14 cells in mid-section of intestine.
  • AWB
  • Neuron class of two ciliated neurons with flattened, sheet-like endings that are associated with the sheath cells of the amphid sensilla
  • AWC
  • Neuron class of two ciliated neurons with large, flattened, sheet-like endings that are associated with the sheath cells of the amphid sensilla.
  • vas deferens cuboidal cell region
  • a region of vas deferens, positioned posterior to the valve and anterior to the elongated cell region, formed by cells of cuboidal morphology.
  • somatic gonad precursor
  • any of two cells that generate all somatic tissues of the gonad proper (i.e. ovary or testis ) and genital ducts (e.g. uterus, vas deferens).
  • P2
  • The second (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P3
  • The third (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P8
  • The eighth (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P9
  • The ninth (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P4
  • The fourth (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P5
  • The fifth (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P6
  • The sixth (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P1
  • The first (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P10
  • The tenth (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P7
  • The seventh (count from anterior-most) of twelve postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • seam cell
  • a group of hypodermal cells that lie along the apical midline of the hypodermis, at the extreme left and right sides between nose and tail
  • MCM
  • Neuron class of male specific interneurons (mystery cells of the male) that are born at the early L4 stage, when the male undergoes sexual maturation.
  • XXX cell
  • Two embryonic hypodermal cells (XXXL, XXXR) that may provide a scaffold for the early organization of ventral bodywall muscles and the various socket cells in the lateral and ventral lips. Their cell bodies soon crawl posteriorly, and their processes separate the amphid nerve from the mechanosensory nerves in the late embryo. The XXX processes later retract, and the XXX cell bodies remain in the ventrolateral bodywall near the cell bodies of the posterior arcade and some socket cells where they perform a neurohumoral function, as they retain short processes bordering the pseudocoelom and contain some secretory vesicles.
  • AFD
  • Neuron class of two ciliated neurons that are part of the amphid sensillum; the endings of AFD have numerous villi, which poke into the amphid sheath cells.
  • body wall musculature
  • Longitudinal bands of muscle cells surrounding animal body, with one band running in each quadrant of the body, regulated contraction and relaxation of these muscles cause locomotion.
  • gland cell
  • A variety of very different cell types which share cytoplasmic features (such as large membrane-bound granules) that suggest a role in secretion, thus termed gland cells.
  • GLRDR
  • Set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons
  • GLRVL
  • Set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons
  • GLRL
  • Set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons
  • GLRVR
  • Set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons
  • arcade cell
  • Interfacial (hypodermal) cells which connect the hypodermal epithelium of the lips to the pharyngeal epithelium, firmly binding the inner tissue (the pharynx) to the outer bodywall (the hypodermis).
  • GLRR
  • Set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons
  • GLRDL
  • Set of six cells that form a thin cylindrical sheet between pharynx and ring neuropile; no chemical synapses, but gap junctions with muscle arms and RME motor neurons
  • P9/10R
  • Cell of lineage ABprapapap, born in embryo, one of a group of postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • P9/10L
  • Cell of lineage ABplapapap, born in embryo, one of a group of postembryonic blast cells for ventral cord motorneurons, ventral hypodermis, vulva, male preanal ganglion; ventral hypodermis in L1.
  • ventral cord blast cell
  • Blast cell lying ventrolaterally in the late embryo and L1 larval stage which divides during the late L1 larva in stereotypical reiterated fashion to give rise to many motor neurons which begin function in the ventral cord and preanal ganglion of the early L2 larva, as well as hypodermal cells (which fuse into hyp7) and a series of programmed cell deaths. In addition, the Pn.p daughters of P3 through P8 lineages persist without fusing into the hyp7 syncytium until mid L3 stage when they can be induced to divide further to produce vulval epithelial cells (vulA - vulF) or more hyp7 cells. P0 is also known as W.
  • nervous system
  • Complement of nervous tissue (neurones, nerves, receptors and support cells) serving to detect, relay and coordinate information about an animal's internal and external environments and to initiate and integrate its effector responses and activities.
  • vas deferens
  • That portion of the male reproductive tract, through which sperm are delivered to the proctodeum and then the cloaca in the tail. Thus that portion which is distal to the testis, made of a total of 30 cells.
  • FLP
  • Neuron class of two neurons, which have ciliated endings situated immediately dorsal to the lateral inner labial sensilla in the head but have no associated sheath or socket cells; they have flattened processes in this region of the cilium.
  • somatic gonad
  • The components of the gonad that are separate from the germline proper. In hermaphrodite, these include five tissues which are all derived from the somatic primordium : the distal tip cells, the gonadal sheath, the spermatheca, the spermatheca-uterine valve (sp-ut) and the uterus.
  • blastocoel
  • The fluid-filled compartment inside the developing embryo at the onset of gastrulation, surrounded by the early blastomeres, into which some cells begin to migrate at gastrulation to create a multi-layered embryo. This internal space later is converted into the pseudocoelom as the embryo develops.
  • ADF
  • Neuron class of two neurons that have dual ciliated endings in the amphid sensillum. The endings are in the amphid channel, which is open to the outside. Processes from lateral cell bodies enter the ventral cord via the amphidial commissures and turn anteriorly to enter the nerve ring. The processes of ADF run near the outside surface and posterior face of the ring, in close association with those of AIZ. They meet at the dorsal mid-line and terminate; there is a gap junction at the point or contact. The main synaptic output is to RIA and AIZ; there are also synapses to SMB, AUA and RIR, usually in dyadic combinations with RIA or AIZ. AWB synapses onto ADF in several places, and there are gap junctions to RIH, ADA and AIA.
  • neuronal sheath cell
  • a structural (glial) cell which forms an specialized environment surrounding the sensory ending(s) of one or more neurons; sometimes accompanied by a more distal socket cell. In early development of the sensory nerves and of the nerve ring some sheath cells (cephalics and labials) may also provide a substrate for axon guidance
  • ventral ganglion
  • ganglion lies beside the nerve ring in the head, just anterior of the retrovesicular ganglion. It contains about 20 interneuron and motorneuron cell bodies that all send their neuronal processes into the ring. The cell bodies are divided into two groups by the intrusion of the excretory duct and canal. The cells are bounded by a basal lamina which physically separates them from the lateral ganglion even though they are adjacent to one another.
  • cuticle
  • a rigid external coating which is secreted by the hypodermis, seam and some transitional epithelial cells which covers the outer body, the major openings into the body cavity from the exterior, and two large sensory bristles, the male spicules. The cuticle of the spicules, the hook, and of some portions of the spicule channels is especially rigid and is probably sclerotized. Similar sclerotic features are occasionally noted in the ventral surface of the male tail fan.
  • cuticular ala
  • Small linear ridges running along the lateral lines of the cuticle, lengthwise along the body; these thickenings lie in register with the seam cells which likely produce them and are present in the cuticle of the L1, dauer and adult stages, but not in other larval stages. The alae are suspected to provide better traction when the animal generates a bodywave. Since the animal usually lies on its side, the alae are in perfect position to catch against the substrate.