ALLANTOIS
\ˈalantwˌɑː], \ˈalantwˌɑː], \ˈa_l_a_n_t_w_ˌɑː]\
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vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (reptiles, birds and mammals)
By Princeton University
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An embryonic diverticulum of the hindgut of reptiles, birds, and mammals; in man its blood vessels give rise to those of the umbilical cord.
By DataStellar Co., Ltd
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An embryonic organ, a membranous bag arising from the posterior part of the alimentary canal in the higher vertebrates, and acting as an organ of respiration or nutrition or both, and usually uniting with the chorion.
By Henderson, I. F.; Henderson, W. D.
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One of the membranes enclosing the fetus, the lower part developing into the bladder, and the upper into the urachus.
By Willam Alexander Newman Dorland
Word of the day
Dopamine Acetyltransferase
- An enzyme that catalyzes the of groups from acetyl-CoA to arylamines. They have wide specificity for aromatic amines, particularly serotonin, and can also catalyze acetyl transfer between arylamines without CoA. EC 2.3.1.5.