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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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Complement of nervous tissue (neurones, nerves, receptors and support cells) serving to detect, relay and coordinate information about an animal`s internal and external environments and to initiate and integrate its effector responses and activities. |
nervous system
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|
WBbt:0005735
|
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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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the most extensive region of neuropil in the animal, consists of a large toroidal bundle of processes. |
nerve ring
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circumpharyngeal nerve ring |
WBbt:0006749
|
