1) Fetal membrane
Found on
https://www.crosswordclues.com/clue/allantois
Allantois (s; plural allantoides or allantoises) is a part of a developing amniote`s conceptus (which consists of all embryonic and extra-embryonic tissues). It helps the embryo exchange gases and handle liquid waste. The allantois, along with the amnion and chorion (other embryonic membranes), identify humans, and other mammals, as amniotes. Oth....
Found on
http://en.wikipedia.org/wiki/Allantois
• (n.) Alt. of Allantoid
Found on
http://thinkexist.com/dictionary/meaning/allantois/
an extra-embryonic membrane of reptiles, birds, and mammals arising as a pouch, or sac, from the hindgut. In reptiles and birds it expands greatly ... [5 related articles]
Found on
http://www.britannica.com/eb/a-z/a/48
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) ...
Found on
http://www.encyclo.co.uk/local/20973
(ә-lan´to-is) a small sausage-shaped outpouching from the caudal wall of the yolk sac of the early embryo, associated with early blood formation and development of the urinary bladder; its blood vessels become the umbilical arteries and veins. adj., allanto´ic., adj.
Found on
http://www.encyclo.co.uk/local/21001
Outgrowth from the ventral side of the hindgut in embryos of reptiles, birds and mammals. Serves the embryo as a store for nitrogenous waste and in chick embryos fuses with the chorion to form the chorioallantoic membrane (CAM).
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http://www.encyclo.co.uk/visitor-contributions.php
Type: Term Pronunciation: ă-lan′tō-is Definitions: 1. A fetal membrane developing from the hindgut (or yolk sac, in humans). In humans it becomes a fibrous cord, the urachus; externally, in other mammals, it contributes to the formation of the umbilical cord and placenta; in birds and reptiles, it lies close beneath the porous shell...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=2273
(ua-lan;to-is) An extraembryonic membranous sac involved in the formation of blood cells. It gives rise to the fetal umbilical arteries and vein and also contributes to the formation of the urinary bladder.
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml
The allantois is a structure appearing during the early development of vertebrate animals - Reptiles, Birds, and Mammalia. It is largely made up of blood-vessels, and, especially in birds, attains a large size. It forms the inner lining to the shell, and may thus be viewed as the surface by means of which the respiration of the embryo is carried on...
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http://www.probertencyclopaedia.com/browse/BA.HTM
[
n] - vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (mammals
Found on
http://www.webdictionary.co.uk/definition.php?query=allantois
allantois 1. An elongated bladder developing from the hindgut of the fetus in mammals, birds, and reptiles. In mammals, it contributes to the development of the umbilicus and plancenta. In birds and reptiles, it provides for the exchange of gases through the shell. 2. A membranous sac in the embryos of mammals, birds, and reptiles. 3. The fetal mem...
Found on
http://www.wordinfo.info/words/index/info/view_unit/81/
In avian biology, the extra-embryonic membrane inside the egg that forms a sac into which the developing embryo shunts all metabolic wastes that cannot evaporate through the shell, such as uric acid crystals.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter
noun vascular fetal membrane that develops from the hindgut in embryonic higher vertebrates (reptiles, birds and mammals)
Found on
https://www.encyclo.co.uk/local/20974
Greek allantos = sausage, eidos = like, form.
Found on
https://www.encyclo.co.uk/local/21450
a sac connected to the embryo's abdomen and involved in embryo respiration
Found on
https://www.encyclo.co.uk/local/22440
a vascular, extraembryonic membrane of birds, reptiles, and certain mammals that develops as a sac or diverticulum from the ventral wall of the hindgut.
Found on
https://www.infoplease.com/dictionary/allantois
No exact match found.
