Chorioallantoic placenta

Definition

The chorioallantoic placenta is a structure in placental mammals where the chorion and allantois membranes fuse to facilitate nutrient and gas exchange between mother and fetus. It plays a crucial role in fetal development by providing oxygen, nutrients and removing waste products.

5 Must Know Facts For Your Next Test

1. The chorioallantoic placenta is formed from the fusion of the chorion and allantois membranes.
2. It allows for efficient nutrient transfer, gas exchange, and waste elimination between the mother and fetus.
3. This type of placenta is characteristic of eutherian (placental) mammals.
4. Hormones produced by the placenta help maintain pregnancy and support fetal development.
5. The degree of invasiveness of the placenta into the uterine wall varies among different mammalian species.

Related terms

chorion:

The outermost fetal membrane that contributes to forming the placenta in mammals.

allantois:

An extra-embryonic membrane involved in early fluid exchange between the embryo and its surroundings.

eutherian mammals: Mammals characterized by complex placentas allowing prolonged gestation periods within the uterus.