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Allantois


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.
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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 ...
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Found in amniotes, it is one of the four extraembryonic membranes (chorion, amnion, allantois and yolk sac) that are adaptations of the terrestrial egg.
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allantois - extra-embryonic membrane emerging as a sac from the hindgut's ventral wall; formed from the splanchnopleure (combination of endoderm and splanchnic mesoderm).
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allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, embryo, embryogenesis, embryogeny, embryology, extra-embryonic membrane, fetus (or foetus), gastrula, gastrulation, germ layer, germ plasm, germination, ...
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allantois
(al-an-toh-iss) [Gk. allant, sausage]
One of four extraembryonic membranes; serves as a repository for the embryo's nitrogenous waste.
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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.
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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.
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Concepts in developmental biology allantois, amnion, blastocyst, blastomere, blastula, blastulation , chorion, chrysalis, cleavage, ectoderm, embryo, embryogenesis, embryogeny , embryology, endoderm, extra-embryonic membrane , fetus (or foetus), ...
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