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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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neuron with its cell body situated in the head, excluding the pharynx. |
head neuron
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WBbt:0006751
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anterior-most body region containing the pharynx. |
head
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WBbt:0005739
|
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ganglion in the head. |
head ganglion
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WBbt:0005135
|
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exterior tube of two concentric tubes that make up the body, includes the epidermal cells and the attached neurons and muscles. |
body wall
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WBbt:0005742
|
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body region surrounding the anus. |
anal region
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WBbt:0006919
|
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logitudinal quadrant of body wall muscle. |
body wall muscle quadrant
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WBbt:0008262
|
