The uterus is a hollow organ composed of smooth muscle, and the ovaries are a pair of substantial glands located in the female pelvic cavity, composed of medulla and cortex, which periodically produce egg cells. 1. Ovaries: The ovaries are located in the female pelvic cavity, one on each side, and are flat and oval in shape. They are substantial organs whose outer cortex periodically produces and discharges oocytes and secretes sex hormones to maintain female sexual characteristics. 2. Uterus: The uterus is a hollow organ composed of smooth muscle, which is shaped like an inverted pear, and the uterine horns at both ends are connected to the fallopian tubes on both sides. The endometrium inside the uterus undergoes cyclic exfoliation and hyperplasia under the action of hormones produced by the ovaries, thus producing menstruation, and the main functions of the uterus are to produce menstruation and to nurture the fetus.