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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
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gut |
WBbt:0005772
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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
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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 seven motoneurons that innervate dorsal muscles and have cell bodies in the ventral cord. |
DB neuron
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WBbt:0005274
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Neuron class of nine ventral cord motor neuron, innervates dorsal muscle. |
DA neuron
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WBbt:0005278
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neuron with its cell body situated in the tail, posterior to rectum. |
tail neuron
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WBbt:0006759
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rectal gland cell
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WBbt:0005799
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a type of pharyngeal cell that connects basement membrane to the apices of triangle-shaped pharyngeal lumen. |
marginal cell
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WBbt:0003673
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neuron type, member of a set of 12 neurons of the inner labial sensilla. |
inner labial neuron
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IL neuron |
WBbt:0005117
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sixth pharyngeal muscle cell layer |
pm6
|
m6 |
WBbt:0003724
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