key term - Trophoblast

Definition

A trophoblast is a layer of cells forming the outer shell of the blastocyst that provides nutrients to the embryo and develops into a large part of the placenta. It plays a crucial role in the implantation of the blastocyst to the uterine wall.

Related terms

Blastocyst:

A structure formed in early development in mammals, consisting of an inner cell mass, an internal cavity, and an outer layer known as the trophoblast.

Placenta:

An organ that develops in your uterus during pregnancy, providing oxygen and nutrients to your growing baby and removing waste products from your baby's blood.

Implantation:

The process by which a fertilized egg attaches to the lining of the uterus where it can then grow and develop into a fetus