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Q: What does the allantois function as?
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What is an allantois?

An allantois is a sac which develops in the alimentary canal of the embryos of mammals, birds and reptiles.


What forms the umbilical cord?

allantois


What membranes forms the umbilical cord?

allantois


The allantois membrane and what form the placenta?

chorion


What produces the amnion yolk sac and allantois?

The inner cell mass (ICM) produces three embryonic membranes, the amnion, allantois, and the yolk sac.


What structure are the blood vessels of the umbilical cord derived from?

allantois


The umbilical cord is formed by the what?

for A+ students like me: The Allantois raynaray


What is the fetal membrane that forms the basis of the umbilical cord?

allantois


What does the embryo excrete nitrogenous waste into?

It excretes it into the ALLANTOIS GLAND.


The allantois membrane and which of these form the placenta?

The allantois membrane and the chorion form the placenta in mammals. The chorion is the outermost fetal membrane that encases the embryo and later fuses with the maternal tissue to form the placenta.


What is the membranous sac into which an embryos wastes are excreted called?

Anatomical terminology. The allantois (plural allantoides or allantoises) is a hollow sac-like structure filled with clear fluid that forms 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.


What are the three layer of membrane that make up the placenta?

Allantois, amnion, and chorion