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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
|
gut |
WBbt:0005772
|
|
female genital. |
vulva
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WBbt:0006748
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|
A group of six equivalent cells forms a tightly constructed `valve` that links the posterior bulb of the pharynx to the anterior four cells of the intestine. These six cells comprise a small epithelial channel with a cuticular lining in continuity with the pharyngeal cuticle and link the lumen of the pharynx to the large lumen of the anterior intestine. |
pharyngeal-intestinal valve
|
cardia |
WBbt:0005767
|
|
Epidermal layer. |
hypodermis
|
epidermis |
WBbt:0005733
|
|
Longitudinal bands of muscle cells surrounding animal body, with one band running in each quadrant of the body, regulated contraction and relaxation of these muscles cause locomotion. |
body wall musculature
|
body muscle |
WBbt:0005813
|
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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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muscle associated with hermaphrodite vulva. |
vulval muscle
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|
WBbt:0005821
|
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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
|
|
neuron with its cell body situated in the head, excluding the pharynx. |
head neuron
|
|
WBbt:0006751
|
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a single, H-shaped cell which lies just above the anus and connects the roof of the anal canal to the dorsal bodywall; its contractions act to increase the size of the anal opening by lifting the roof of the rectum and hence facilitate expulsion of intestinal contents. |
anal depressor muscle
|
dilator muscle |
WBbt:0004292
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neuron with its cell body situated in the tail, posterior to rectum. |
tail neuron
|
|
WBbt:0006759
|
|
five pairs of thin gonadal sheath cells form a single layer covering the germ line component of each arm, each pair occupying a stereotyped position along the gonad proximal-distal axis. |
gonadal sheath cell
|
|
WBbt:0005828
|
|
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reproductive system
|
|
WBbt:0005747
|
