the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
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allantois::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Type of | fetal membrane |
Examples of allantois
allantois
The allantois functions similarly in monotremes, which are egg-laying mammals.
From the en.wikipedia.org
An amnion, chorion, and allantois are present during embryonic life.
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Oxygen is absorbed by the allantois through the egg shell.
From the en.wikipedia.org
An exception is the allantois of the bandicoot, which has a vasculature, and fuses with the chorion.
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The function of the allantois is to collect liquid waste from the embryo, as well as to exchange gases used by the embryo.
From the en.wikipedia.org
The first of these is the cranial portion which is continuous with the allantois and forms the bladder proper.
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The human allantois is an endodermal evagination of the developing hindgut which becomes surrounded by the mesodermal connecting stalk.
From the en.wikipedia.org
The human urinary bladder is derived in embryo from the urogenital sinus and, it is initially continuous with the allantois.
From the en.wikipedia.org
- The vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
- (allantoic) relating to or characterized by an allantois
- Allantois (plural allantoides or allantoises) is a part of a developing animal conceptus (which consists of all embryonic and extra-embryonic tissues). It helps the embryo exchange gases and handle liquid waste.
- A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles
- One of four extraembryonic membranes; serves as a repository for the embryo's nitrogenous waste.
- Greek allantos = sausage, eidos = like, form.
- Extra-embryonic membrane emerging as a sac from the hindgut's ventral wall; formed from the splanchnopleure (combination of endoderm and splanchnic mesoderm). ...
- Sac that develops between the eggshell and amnion for respiration of the embryo in a cleidoic egg.
- 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.
