Allantois is a part of a developing animal conceptus . It helps the embryo exchange gases and handle liquid waste.
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allantois
an embryonic membrane of higher vertebrates
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Allantois
[Gr. allantos - a sausage]. An extraembryonic membrane formed by an extension of the hindgut into the extraembryonic coelom and consisting of endoderm and splanchnic mesoderm.
allantois - extra-embryonic membrane emerging as a sac from the hindgut's ventral wall; formed from the splanchnopleure (combination of endoderm and splanchnic mesoderm).
allantois
One of four extraembryonic membranes; serves as a repository for the embryo's nitrogenous waste.
allele
an alternative form of a gene.
Covered in BIOL1020 Lab 7 Genetics ...
allantois
(al-an-toh-iss) [Gk. allant, sausage]
One of four extraembryonic membranes; serves as a repository for the embryo's nitrogenous waste.
allele ...
The Allantois (Figs. 25 to 28)."The allantois arises as a tubular diverticulum of the posterior part of the yolk-sac; ...
allantois One of the extraembryonic membranes of the amniotes that functions in respiration and excretion in birds and reptiles and plays an important role in the development of the placenta in most mammals.
Allantois AlleleAlternative version of a gene. [in Mendel's peas] [in a three-point cross] [RFLPs] [hemoglobin beta chain] [and protein polymorphisms] AllergenAn antigen that provokes an allergic response.
allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, differentiation, embryo, embryogenesis, embryogeny, embryology, extra-embryonic membrane, fetus, gastrula, gastrulation, germ layer, germ plasm, ...
Like the allantois, it arises from the splanchnopleure (endoderm and splanchnic mesoderm) to surround the mass of yolk in reptile and bird eggs. It is connected to the midgut by the yolk stalk.
 See also: Membrane, Embryo, Organ, Amnion, Cells
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