Question

What is the function of the stratum basalis of the endometrium?

Answer 1

Hint: The stratum basalis layer is the deepest tissue of the endometrium and is adjacent to the myometrium. It's the constant layer of endometrium that doesn't undergo conformational changes during the uterine cycle and its purpose is to exchange tissue loss during menstruation.

Complete answer:
The endometrium is the inner epithelial layer, alongside its mucosa, of the mammalian uterus. It's a basal layer and a functional layer; the functional layer then is shed during menstruation in humans and a few other mammals, including apes, Old World monkeys, some species of bat, the elephant shrew, and therefore the Cairo spiny mouse. Cells from the glandular epithelium, stroma, and blood vessels of the stratum basalis proliferate and restore the endometrium after menstruation. The more superficial and thicker layer of the endometrium, which is made after menstruation, is called the stratum functionalis.
The endometrium consists of two layers: the basal layer or stratum basalis and therefore the functional layer or stratum. The stratum basalis is adjacent to the myometrium, isn't shed at menstruation, and provides rise to the stratum functionalis.
The endometrium is the innermost lining layer of the uterus, and functions to stop adhesions between the opposed walls of the myometrium, thereby maintaining the patency of the cavity. During the cycle or estrous cycle, the endometrium grows to a thick, blood vessel-rich, glandular membrane.

Note:
The stratum basalis consists of permanent stromal tissue and deep ends of the uterine glands. These tissues remain through each cycle and function as sources for cells during regrowth of the superficial stratum functionalis.