• rectal muscle
    • muscle that controls hermaphrodite rectal opening.
  • anal region
    • body region surrounding the anus.
  • anal depressor muscle
    • a single, H-shaped cell which lies just above the anus and connects the roof of the anal canal to the dorsal bodywall; its contractions act to increase the size of the anal opening by lifting the roof of the rectum and hence facilitate expulsion of intestinal contents.
  • obsolete anal muscle
  • anal sphincter muscle
    • a saddle-shaped muscle cell that encircles the intestinal-rectal valve
  • anal depressor muscle hermaphrodite
    • Anal depressor muscle of a hermaphrodite animal.
  • anal depressor muscle male
    • Anal depressor muscle of a male animal.
  • anal sphincter muscle male
  • anal sphincter muscle hermaphrodite
  • PVP
    • Neuron class of two neurons with cell bodies situated in the pre-anal ganglion.
  • PDB
    • Neuron class of one motor neuron, process in dorsal cord, cell body in pre-anal ganglion.
  • DX1
    • Male specific neuron, darkly staining cell body in pre- anal ganglion, process penetrate basement membrane and contact muscles, class one.
  • DX3
    • Male specific neuron, darkly staining cell body in pre- anal ganglion, process penetrate basement membrane and contact muscles, class three.
  • DX4
    • Male specific neuron, darkly staining cell body in pre- anal ganglion, process penetrate basement membrane and contact muscles, class four.
  • DX2
    • Male specific neuron, darkly staining cell body in pre- anal ganglion, process penetrate basement membrane and contact muscles, class two.
  • lumbar ganglion
    • The left and right lumbar ganglia lie behind the pre-anal ganglion in the tail, in lateral positions. Each contains 12 neuron cell bodies that send most of their neuronal processes into the ventral nerve cord via lumbar commissures and the pre-anal ganglion. There is no local neuropil in these ganglia in the hermaphrodite, instead they form most synapses in the pre-anal ganglion. Most lumbar neurons have sensory functions. In the adult male tail, these two ganglia gain many additional neurons and have some local neuropil. The lumbar neurons lie in close association with the lateral hypodermis, and most are posterior to the anus.
  • dorso-rectal ganglion
    • the ganglion that lies above and behind the rectum in the tail, in close continuity with the anal hypodermal ridge. It contains 3 neuron cell bodies (DVA, DVB and DVC) that send their neuronal processes into the ventral nerve cord via dorso-rectal commissures that encircle the anus. The ganglion contains no local neuropil in the hermaphrodite. In the adult male tail, this ganglion gains additional neurons and some local neuropil.