|
|
Definition of Allantois
1. Noun. The vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals).
Definition of Allantois
1. Noun. (anatomy) A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles. ¹
¹ Source: wiktionary.com
Definition of Allantois
1. [n -TOIDES]
Medical Definition of Allantois
1. An embryonic diverticulum of the hindgut of reptiles, birds, and mammals; in man its blood vessels give rise to those of the umbilical cord. (12 Dec 1998)
Lexicographical Neighbors of Allantois
Literary usage of Allantois
Below you will find example usage of this term as found in modern and/or classical literature:
1. A Treatise on Comparative Embryology by Francis Maitland Balfour (1885)
"The allantois. The relations of the allantois to the adjoining organs, ...
We have in tracing the origin of the allantois to deal with a case of what Dohrn ..."
2. Anatomy, Descriptive and Surgical by Henry Gray (1893)
"The allantois.—This structure is derived from the layers of the ... When the
allantois meets the chorion, branches from these allantoic vessels permeate the ..."
3. A Treatise on Human Physiology by John Call Dalton (1861)
"By a continuation of the above process, the allantois at la grows to such an
extent as to envelope completely the body of the embryo, together with the ..."
4. A Laboratory Text-book of Embryology by Charles Sedgwick Minot (1903)
"When the allantois develops according to this type, it is spoken of as free, ...
This form of the allantois may be readily observed in chicken embryos, ..."
5. The Elements of Embryology by Michael Foster, Francis Maitland Balfour (1883)
"Since however the allantois does not always come in contact with the whole ...
The mesoblast of the allantois, especially that part of it which assists in ..."
6. Elements of Physiology by Joh. Müller (1843)
"The allantois, Umbilical Vesicle and Umbilical Cord—Development of the Embryo
... Thus constituted the allantois shoots into the space between the amnion, ..."
7. Anatomy, Descriptive and Applied by Henry Gray (1913)
"The allantois (Figs. 82 to 85).—The allantois arises as a tubular diverticulum
of the posterior part of the yolk-sac; when the hind-gut is developed the ..."
8. The Development of the Chick: An Introduction to Embryology by Frank Rattray Lillie (1908)
"The stalk of the allantois is exaggerated in all the diagrams to bring out its
... The allantois is represented as a sac, the stalk of which enters the ..."
Other Resources:
