Difference between Amnion And Allantois: Overview, Functions

Definition Of Amnion And Allantois

The amnion and the allantois are two extra-embryonic membranes that conduct two different functions of embryonic development. Their role has to be studied to realise the intricacies of early development.

What Is The Amnion?

The amnion is a very thin membrane covering the embryo. It forms a cavity filled with amniotic fluid. This fluid performs many vital functions, such as cushioning against shocks to the embryo and providing constant temperature conditions.

What Is Allantois?

The allantois is a sac-like, routinely developed structure from the embryonic gut. It contributes to a vital part of the waste management system and gas exchange in the early period of development. The allantois contributes to the umbilical cord.

Key Differences Between Amnion And Allantois

Amnion And Allantois Developmental Timeline

The details are given below:

The Amnion

The amnion originates a few days after fertilisation. It covers and encapsulates the embryo from all sides.

The Allantois

The allantois begins its development from the embryonic gut while the embryonic gastrulation process takes place.

Why Knowing The Difference Is Important

Differentiation of the amnion from the allantois is very important in understanding the various functions each of them does during embryonic development. Defects in either structure may result in complications during pregnancy.

Conclusion:

Amnion and allantois are two major extraembryonic layers that differentiate in their functions: the amnion protects the embryo and provides it with a stable environment, whereas the allantois disposes of waste material in addition to contributing to umbilical cord formation. It is, therefore, important to acknowledge such differences to learn about embryonic development and possible anomalistic conditions.