The ovaries and testicles (gonads) also make sex hormones. Eggs (ova) are made in the ovaries, and sperm in the testicles. The ducts from the bulbourethral glands open into the penile urethra.New life begins when an egg from a woman is fertilised by sperm from a man. The longest portion is the penile urethra (also called spongy urethra or cavernous urethra), which extends the length of the penis and opens to the outside at the external urethral orifice. The next portion, the membranous urethra, is a short region that passes through the pelvic floor. It receives the ejaculatory duct, which contains sperm and secretions from the seminal vesicles, and numerous ducts from the prostate glands. The prostatic urethra is the proximal portion that passes through the prostate gland. The male urethra is divided into three regions. While reproductive fluids are passing through the urethra, sphincters contract tightly to keep urine from entering the urethra. It is a passageway for sperm and fluids from the reproductive system and urine from the urinary system. The urethra extends from the urinary bladder to the external urethral orifice at the tip of the penis. Each ejaculatory duct passes through the prostate gland and empties into the urethra. Ejaculatory DuctĮach ductus deferens, at the ampulla, joins the duct from the adjacent seminal vesicle (one of the accessory glands) to form a short ejaculatory duct. The spermatic cord contains the ductus deferens, testicular artery and veins, lymph vessels, testicular nerve, cremaster muscle that elevates the testes for warmth and at times of sexual stimulation, and a connective tissue covering. The proximal portion of the ductus deferens is a component of the spermatic cord, which contains vascular and neural structures that supply the testes. Sperm are stored in the proximal portion of the ductus deferens, near the epididymis, and peristaltic movements propel the sperm through the tube. Just before it reaches the prostate gland, each ductus deferens enlarges to form an ampulla. It crosses over the ureter and posterior portion of the urinary bladder, and then descends along the posterior wall of the bladder toward the prostate gland. The ductus deferens enters the abdominopelvic cavity through the inguinal canal and passes along the lateral pelvic wall. It begins at the bottom (tail) of the epididymis then turns sharply upward along the posterior margin of the testes. The ductus deferens, also called vas deferens, is a fibromuscular tube that is continuous ( or contiguous) with the epididymis. Mature sperm are stored in the lower portion, or tail, of the epididymis.
They complete their maturation process and become fertile as they move through the epididymis. When the sperm leave the testes, they are immature and incapable of fertilizing ova. Each epididymis is a long (about 6 meters) tube that is tightly coiled to form a comma-shaped organ located along the superior and posterior margins of the testes.
#PLACE OF SPERM PRODUCTION SERIES#
Sperm leave the testes through a series of efferent ducts that enter the epididymis. After they leave the testes, the sperm passes through the epididymis, ductus deferens, ejaculatory duct, and urethra. Sperm cells pass through a series of ducts to reach the outside of the body.
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