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Paul Kim

Male reproductive system (English)

Male reproductive system (English)

This image shows the main parts of the internal and external male reproductive organs. The testis is the primary male reproductive organ in charge of sperm production. It is a paired, ellipsoid-shaped structure located in the scrotum. The testis contains numerous lobules composed of seminiferous tubules separated by fibrous bands (septa of testis). Each testis carries a firm, highly-coiled tube attached to its posterior surface, called the epididymis. The epididymis has three distinct parts (head, body and tail) and functions to facilitate the maturation of spermatozoa. The tail of the epididymis is continuous with the ductus deferens (vas deferens). The ductus deferens, along with the surrounding neurovasculature, comprises the spermatic cord. The ductus deferens terminates by joining the duct of the seminal glands to form the ejaculatory duct. The most distal structure of the male reproductive canal is the urethra, which expels both urine and sperm. In addition, the male reproductive system has three types of major accessory glands including the seminal glands (seminal vesicles), prostate glands and bulbourethral glands.
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