Allantois vs Chorion - What's the difference?
allantois | chorion |
(anatomy) A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles.
(anatomy, biology) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.
* 2002 , Rovert E. A. Stewart, Barbara E. Stewart, Female Reproductive Systems'', entry in ''Encyclopedia of Marine Mammals ,
* 2006 , Ona Marie Faye-Petersen, Debra S. Heller, Vijay V. Joshi, Handbook Of Placental Pathology ,
* 2007 , Susan Tucker Blackburn, Maternal, Fetal, & Neonatal Physiology: A Clinical Perspective ,
(biology, entomology) The outer case of an insect egg.
* 1994 , Klaus Urich, Comparative Animal Biochemistry ,
* 1998 , R. F. Chapman, The Insects: Structure and Function ,
* 2008 , John L. Capinera, Eggs of Insects'', entry in John L. Capinera (editor), ''Encyclopedia of Entomology ,
(botany) The outer membrane of seeds of plants.
As nouns the difference between allantois and chorion
is that allantois is a sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles while chorion is the protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.allantois
English
Noun
(wikipedia allantois) (en-noun)Synonyms
* allantoic sac * allantoidAnagrams
*chorion
English
(wikipedia chorion)Noun
(en-noun)page 425,
- The allantois fuses with the chorion , forming a small round area, the allentochorion. This region becomes the placenta (Fig. 3).
page 4,
- In this illustration, some license is taken, since the amnion is shown as still separate from the chorion'; this is done to illustrate the process of apposition of the amniotic sac to the '''chorion''' and to accentuate the interposition of the yolk sac between the amnion and the ' chorion .
page 106,
- The amnion and chorion begin to develop soon after fertilization and continue to grow until about 28 weeks? gestation.
page 392,
- The chorion has a predominantly lamellar structure, the lamellae being two-dimensional networks of protein fibrils.
page 326,
- Even closely related species may have chorions' differing in thickness. In the silkmoths, for example, the '''chorion of ''Bombyx'' is about 25 ?m thick while that of ''Hyalophora is 55 ?m thick.
page 1290,
- In addition to facilitating gas exchange and water conservation, the chorion must, in some cases, allow uptake of water or liquid nutrients from the environment.
