Endometrium

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** The mucous membrane comprising the inner layer of the uterine wall; it consists of a simple columnar epithelium and a lamina propria that contains simple tubular uterine glands. The structure, thickness, and state of the endometrium undergo marked change with the menstrual cycle.

**Synonyms:** - ENDOMETRIUM - Tunica Mucosa - endometrium - endometrium