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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
|
esophagus |
WBbt:0003681
|
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Contractile cell that makes up muscle tissue. |
muscle cell
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WBbt:0003675
|
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neuron making synapse on an effector (muscle, gland). |
motor neuron
|
motoneuron |
WBbt:0005409
|
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neuron that has neural processes in the nerve ring. |
nerve ring neuron
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WBbt:0006974
|
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neuron that senses and responds to mechanical stimuli, such as touch. |
mechanosensory neuron
|
|
WBbt:0008431
|
