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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. |
intestine
|
gut |
WBbt:0005772
|
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a large process bundle that runs along the vental mid-line extending from the ventral region of the nerve ring. |
ventral nerve cord
|
ventral cord |
WBbt:0005829
|
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the feeding organ, a neuro-muscular pump in the head of the animal, used to ingest food, bacteria suspended in liquid, filter them out, grind them up and transport posteriorly into the instestine. |
pharynx
|
esophagus |
WBbt:0003681
|
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neuron with its cell body situated in the head, excluding the pharynx. |
head neuron
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WBbt:0006751
|
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Neuron class of one interneuron, projects along ventral cord to ring. |
PVT
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lineage name: ABplpappppa |
WBbt:0004070
|
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The outlet of the excretory sinus to the exterior environment through the cuticle, on the ventral side of the head, just behind the nerve ring. |
excretory pore
|
pore |
WBbt:0005778
|
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cell that forms the duct of the excretory system. |
excretory duct cell
|
exc duct |
WBbt:0004540
|
