from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Variant of coelom.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The body cavity
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity
Sorry, no etymologies found.
Keď vezmeme do úvahy mladom veku moderný trhový systém, neuveriteľné prírodné zdroje, ktoré spotrebuje, a obrovské množstvo odpadu, ktorý produkuje, je ťažké nedívat sa na konzumu bujnie ako forma masovej psychózy infikovať ľudí po celom svete a presvedčiť ich, aby kúpiť hmotnosť množstvo vecí, ktoré nepotrebujú.
The portions which lie in the genital core fuse to form the uterus and vagina; the parts in front of this cord remain separate, and each forms the corresponding uterine tubethe abdominal ostium of which is developed from the anterior extremity of the original tubular invagination from the celom (Fig. 1110, B).
Each arises on the lateral aspect of the corresponding Wolffian duct as a tubular invagination of the cells lining the celom (Fig. 1106).
The lateral leaves of somatopleure then grow round on each side, and, meeting on the ventral aspect of the allantois, enclose the vitelline duct and vessels, together with a part of the extra-embryonic celom; the latter is ultimately obliterated.
In reptiles, birds, and many mammals the allantois becomes expanded into a vesicle which projects into the extra-embryonic celom.
Its dorsal surface is covered by the amnion, while its ventral surface is bounded by the extra-embryonic celom, and is in contact with the vitelline duct and yolk-sac.
This fluid increases in quantity and causes the amnion to expand and ultimately to adhere to the inner surface of the chorion, so that the extra-embryonic part of the celom is obliterated.
The space between the amnion and the serosa constitutes the extra-embryonic celom, and for a time communicates with the embryonic celom.
Later it becomes completely separated from the celomic epithelium and forms a suprarenal ridge projecting into the celom between the mesonephros and the root of the mesentery.
The two cavities in the general mesoderm unite on the ventral aspect of the gut and form the pleuro-peritoneal cavity, which becomes continuous with the remains of the extra-embryonic celom around the umbilicus; the two cavities in the pericardial area rapidly join to form a single pericardial cavity, and this from two lateral diverticula extend caudalward to open into the pleuro-peritoneal cavity (Fig. 54).