What is the endometrium?

What is the endometrium?

• A. Mucosal lining
• B. Muscular wall
• C. Outer serous layer
• D. Connective tissue

Answer: (A)

The endometrium is the mucosal lining of the uterus—the inner surface that directly lines the uterine cavity. It’s made up of a simple columnar epithelium with embedded glands within a connective tissue stroma (the lamina propria). This mucous membrane thickens and then sheds in a menstrual cycle in response to ovarian hormones, with the functional layer sloughing off and the basal layer remaining to regenerate the lining. It’s distinct from the muscular middle layer (myometrium) and the outer serous covering (perimetrium).

The endometrium is the mucosal lining of the uterus—the inner surface that directly lines the uterine cavity. It’s made up of a simple columnar epithelium with embedded glands within a connective tissue stroma (the lamina propria). This mucous membrane thickens and then sheds in a menstrual cycle in response to ovarian hormones, with the functional layer sloughing off and the basal layer remaining to regenerate the lining. It’s distinct from the muscular middle layer (myometrium) and the outer serous covering (perimetrium).