Tightly coiled tubules where sperm mature

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Paired Organ : Yes. Each testicle is considered a separate site unless bilateral involvement is stated to be metastatic from one side to the other. The two testicles are egg-shaped male reproductive glands. They are suspended in a pouch of loose skin called the scrotum below and behind the penis. In maturity, they are usually slightly smaller than a golf ball. It is normal for one testicle to be larger than the other.
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Anatomy of the Testis

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The Male Reproductive System | Boundless Anatomy and Physiology

Sperm cells pass through a series of ducts to reach the outside of the body. After they leave the testes, the sperm passes through the epididymis , ductus deferens , ejaculatory duct , and urethra. Sperm leave the testes through a series of efferent ducts that enter the epididymis. 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. When the sperm leave the testes, they are immature and incapable of fertilizing ova. They complete their maturation process and become fertile as they move through the epididymis. Mature sperm are stored in the lower portion, or tail, of the epididymis.
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Duct System

The epididymis plural, epididymides is a tightly coiled mass of thin tubes that carries sperm from the testes to the ductus deferens in the male reproductive system. Sperm matures as it passes through the epididymis so that it is ready to fertilize ova by the time it enters the ductus deferens. The epididymis is a crescent-shaped coil of thin tubules located inside the scrotum and posterior to the testis.
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The male reproductive system includes external penis, scrotum, epididymus, and testes and internal accessory organs. These external structures are the penis, scrotum, epididymis, and testes. Male Reproductive System : Lateral view of male reproductive system with organs labeled. The penis is the male organ for sexual intercourse and urination.
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