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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 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 eleven motoneurons, distributed along the ventral cord, which innervate ventral body muscles. |
VB neuron
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WBbt:0005336
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Neuron class of three interneurons, which send processes anteriorly up the sub-lateral cords in the head. |
SAB
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WBbt:0005396
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Neuron class of two neurons with cell bodies situated in the lumbar ganglion. |
PLN
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WBbt:0006855
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Neuron class of four interneurons, which send processes posteriorly down the sub-lateral cords. |
SIA
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WBbt:0005361
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