|
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
|
|
Epidermal layer. |
hypodermis
|
epidermis |
WBbt:0005733
|
|
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
|
|
WBbt:0005735
|
|
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
|
|
cell line which early in development becomes differentiated from the remaining somatic cell line, and alone has the potential to undergo meiosis and form gametes. |
germ line
|
germline |
WBbt:0005784
|
|
posterior region, from rectum to the end |
tail
|
|
WBbt:0005741
|
|
anterior-most body region containing the pharynx. |
head
|
|
WBbt:0005739
|
|
a region around premature germline, consists of cells of pedigree Z1 and Z4, which develops to become the somatic gonad. |
gonadal primordium
|
|
WBbt:0008366
|
|
|
reproductive system
|
|
WBbt:0005747
|
|
exterior tube of two concentric tubes that make up the body, includes the epidermal cells and the attached neurons and muscles. |
body wall
|
|
WBbt:0005742
|
|
inner tube of two concentric tubes that make up the body |
digestive tract
|
|
WBbt:0005743
|
|
body region posterior to the head and anterior to the tail |
midbody
|
|
WBbt:0005740
|
|
|
reproductive tract
|
|
WBbt:0005744
|
|
|
alimentary system
|
|
WBbt:0005748
|
|
body region surrounding the anus. |
anal region
|
|
WBbt:0006919
|
|
Portion of the digestive tract between the oral opening and the definitely tri-radiate beginning of the esophagus (pharynx). |
stoma
|
|
WBbt:0008374
|
