Annular Rings - spiral interlocking rings located in the cervical canal which securely close passage to the uterus. Broad Ligament - ligament which supports the genital organs of the cow and attaches in the region of the ilium. The broad ligament carries the vascular supply and nerve fibers to the internal genitalia. Caruncle - nonglandular projects on inner surface of uterus which join with cotyledons of the placenta during pregnancy to form the placentome. Cervix - a thick, fibrous organ that serves as the opening to the uterus from the vagina.
Primary function is to prevent foreign material from entering uterus.
Clitoris - located within the vulva, made up of erectile tissue which has same embryonic origin as the male penis. Stimulation may increase uterine motility. Corpus Luteum - an endocrine gland that forms from the luteinization of the granulosa cells of the ruptured follicle under the influence of the luteinizing hormone. The corpus luteum phase of the estrous cycle then regresses. In the pregnant animal, it remains active throughout pregnancy.