The lining of the uterus is called the

A) diaphragm.
B) endothelium.
C) endometrium.
D) hymen.
E) cervix.

Endometrium

The inner lining of the uterus, which thickens during the menstrual cycle to prepare for potential pregnancy.

Uterus Lining

The inner layer of the uterus, known as the endometrium, which thickens during the menstrual cycle to prepare for potential implantation of an embryo.

Endothelium

The tissue that lines the cavities of the heart, blood vessels, and lymph vessels.