What is the innermost layer of the uterus called?

The innermost layer of the uterus is known as the endometrium. This layer plays a crucial role in the reproductive cycle, as it is the lining that thickens and sheds during menstruation and serves as the site for implantation of a fertilized egg. Its structure is designed to support fertilization and early embryo development. During pregnancy, the endometrium transforms to support the growing fetus, emphasizing its importance in reproductive health.

The myometrium, which is the middle layer of the uterine wall, consists of smooth muscle and is primarily responsible for the contractions of the uterus during labor. The perimetrium is the outermost layer, serving as a protective covering for the uterus. The parametrium refers to the connective tissue surrounding the uterus, rather than a layer of the uterus itself. Understanding the specific roles and characteristics of these layers helps in grasping the anatomy and functions of the uterus.