A very early condition of Man, with yelk-sac, allantois, and amnion (original).
"Lectures and Essays" by T.H. Huxley
ALLANTOIS, a membrane enveloping the foetus in mammals, birds, and reptiles.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
Blood is taken out to the allantois, however, by the arteries of the latter type.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells
Endochorium: the layer of the allantois that lines the chorium; the inner layer of the chorium.
"Explanation of Terms Used in Entomology" by John. B. Smith
This bag is called the allantois, and serves as a sort of lung for the developing chick.
"The Meaning of Evolution" by Samuel Christian Schmucker
The allantois also contains a fluid which is known as the allantoid liquid.
"Special Report on Diseases of Cattle" by U.S. Department of Agriculture
Three sets of structures are concerned in human embryonic nourishment, namely, the Allantois, the Villi of the Chorion, and the Placenta.
"Embryology" by Gerald R. Leighton
C. The very young puppy, with attached ends of the yelk-sac and allantois, and invested in the amnion.
"Man's Place in Nature and Other Essays" by Thomas Henry Huxley
After the passing away of the yolk sack, the embryo is nourished and sustained by the "allantois," another peculiar sack which is formed.
"Private Sex Advice to Women" by R. B. Armitage
The function of the allantois is still in a great measure unknown.
"A System of Midwifery" by Edward Rigby