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What is an allantois?

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Anonymous

10y ago
Updated: 8/21/2019

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

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Wiki User

10y ago

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What forms the umbilical cord?

allantois


The allantois membrane and what form the placenta?

chorion


What membranes forms the umbilical cord?

allantois


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 germ layers form allantois?

The allantois is primarily derived from the mesoderm and endoderm germ layers. It develops as an outpouching of the hindgut and is involved in the formation of blood vessels and the urinary bladder. The allantois plays a crucial role in the exchange of gases and waste in the developing embryo, particularly in reptiles and mammals.


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

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What does the embryo excrete nitrogenous waste into?

It excretes it into the ALLANTOIS GLAND.


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


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