The Federal Aviation Agency's name changed to the Federal Aviation Administration as it became one of several agencies (e.g., Federal Highway Administration, Federal Railroad Administration, the Coast Guard, and the Saint Lawrence Seaway Commission) within DOT (albeit the largest).
The endometrium is the tissue lining the inner cavity of the uterus (or womb). The uterus, a hollow organ about the size and shape of a pear, is found in a woman's pelvic region and is the organ where the fetus grows until birth. The upper part of the uterus is called the corpus; the lower, narrower part of the uterus is called the cervix. The cervix is the opening between the uterus and the vagina. The outer layer of the uterus is called the myometrium. The myometrium is thick and composed of strong muscles.
Cervix of uterus. The cervix of the uterus, also known as the cervix or uterine cervix, attaches the vagina to the uterus. It is approximately four centimeters long, approximately half of which extends into the vaginal canal; however, the length of the cervix can be affected by age and childbirth, along with individual (genetic) variations.