The word endometrium should be used to refer to the mucous membrane which lines the body of the uterus. The mucosa of the cervical canal is anatomically and physiologically a different structure, and although it may properly be called endometrium, usage more or less restricts that term to the mucosa of the body of the uterus.
The endometrium is intimately connected with the musculature of the uterus and its circulation is greatly influenced by changes which occur in the blood vessels of the myometrium and by the tonicity of the uterine muscle. The endometrium is continuous with the lining membrane of the tubes and with the epithelial layer of the cervix, therefore, it follows that the endometrium is influenced by all inflammatory affections, displacements, new growths and congestions of the genital organs.
By some it is held that the term endometritis (inflammation of the endometrium) should be applied only to
TUCKER EF, MARCY HO, CLARK JG. THE NOMENCLATURE OF ENDOMETRITIS.. JAMA. 1907;XLVIII(12):1002-1003. doi:10.1001/jama.1907.25220380018001c