Male reproductive systemFemale reproductive systemHeadsPenis• There are two testes, located on the outside of the body inside sac-like structures called the scrotum, within the pelvic region, posterior to the urethra penis and anterior to the anus. (David, 2014)• Testes weigh approximately 25 grams each; They are 4 – 5 cm long and 2 – 3 cm wide. (David, 2014) • The testes are covered by a fibrous capsule called the tunica Albuginea (David, 2014). • The tunic is divided by fibrous tissues to form a lobed-shaped web. Each lobe is made up of 3 to 10 spiral tubules called seminiferous tubules surrounded by connective tissue. (David, 2014)• The penis is made up of three parts: the root attached to the wall of the abdomen, the body or shaft and the glans. The glans is the head of the penis covered with a loose layer of skin called the foreskin. The opening of the urethra is located at the tip of the glans and is contained in the corpus spongiosum.• The penis contains a number of sensitive nerve endings, lymphatic and blood vessels, also two suspensory ligaments made up of elastic fibers.• The body of the penis is cylindrical in shape and consists of three internal chambers, the corpus spongiosum,• All three chambers are made up of sponge-like erectile tissues called the corpus cavernosum. They contain large spaces that fill with blood; the skin is soft and elastic.• Erectile tissues sit in metal pools of blood vessels called cavernous sinuses.• Each of these muscles is surrounded by smooth muscles and supported by elastic fibrous tissues, made of proteins called collagen.Epididymis• The epididymis is a coiled tube, cord-like structure that lies posterior to the testes within the center of the paper......the layers have longitudinal fibers. These fiber endings are called fimbriae. (The Editors of Encyclopedia Britannica, 2014) The Uterus • The uterus is a thick muscular organ located medial to the abdomen. In an adult female the uterus is 7.5 cm long, 5 cm wide and 2.5 cm thick before pregnancy. (Dr.Barbara,2014 )• The thinnest part of the uterus known as the cervix. The anterior part of the body of the uterus is known as the corpus uteri. This more circular. (Dr.Barbara,2014 )• The uterus is made up of three layers: the myometrium, which forms the majority of the musculature of the uterus, very compact and made up of unwashed and densely compacted smooth muscle fibres. The serous membrane, the outer layer that covers most of the uterus, then folds over to form the ligament of the uterus on each side. The endometrium is the innermost membrane that lines the uterine cavity of the uterus. (Dr. Barbara,2014 )