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Testes

Testicles; Gonads - male

The testes are 2 egg-shaped male reproductive organs located in the scrotum. They produce sperm and the male hormone, testosterone.

References

Elder JS. Disorders and anomalies of the scrotal contents. In: Kliegman RM, Stanton BF, St. Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 545.

Kavoussi PK. Surgical, radiographic, and endoscopic anatomy of the male reproductive system. In: Wein AJ, Kavoussi LR, Partin AW, Peters CA, eds. Campbell-Walsh Urology. 11th ed. Philadelphia, PA: Elsevier; 2016:chap 21.

McKenney JK. Testis and testicular adnexa. In: Goldblum JR, Lamps LW, McKenney JK, Myers JL, eds. Rosai and Ackerman's Surgical Pathology. 11th ed. Philadelphia, PA: Elsevier ; 2018:chap 27.

    • Male reproductive anatomy

      Male reproductive anatomy - illustration

      The male reproductive structures include the penis, the scrotum, the testes, the epididymis, the seminal vesicles, and the prostate.

      Male reproductive anatomy

      illustration

    • Sperm

      Sperm - illustration

      The male reproductive system creates sperm that is manufactured in the seminiferous tubules within each testicle. The head of the sperm contains the DNA, which when combined with the eggs DNA, will create a new individual. The tip of the sperm head is the portion called the acrosome, which enables the sperm to penetrate the egg. The midpiece contains the mitochondria which supplies the energy the tail needs to move. The tail moves with whip-like movements back and forth to propel the sperm towards the egg. The sperm have to reach the uterus and the fallopian tube in order to fertilize a womans egg.

      Sperm

      illustration

      • Male reproductive anatomy

        Male reproductive anatomy - illustration

        The male reproductive structures include the penis, the scrotum, the testes, the epididymis, the seminal vesicles, and the prostate.

        Male reproductive anatomy

        illustration

      • Sperm

        Sperm - illustration

        The male reproductive system creates sperm that is manufactured in the seminiferous tubules within each testicle. The head of the sperm contains the DNA, which when combined with the eggs DNA, will create a new individual. The tip of the sperm head is the portion called the acrosome, which enables the sperm to penetrate the egg. The midpiece contains the mitochondria which supplies the energy the tail needs to move. The tail moves with whip-like movements back and forth to propel the sperm towards the egg. The sperm have to reach the uterus and the fallopian tube in order to fertilize a womans egg.

        Sperm

        illustration

      Review Date: 10/10/2017

      Reviewed By: Jennifer Sobol, DO, urologist with the Michigan Institute of Urology, West Bloomfield, MI. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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