Reproductive system
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Reproductive System. Male Reproductive System. Formation of Sperm Cells. Spermatogenesis – sperm production. 4 sperm cells result from meiosis of a primary spermatocyte . Spermiogenesis – process of sperm cell maturation. Sperm cell parts: Head Contains the nucleus with 23 chromosomes

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Reproductive System

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Reproductive system

Reproductive System

Male Reproductive System


Formation of sperm cells

Formation of Sperm Cells

  • Spermatogenesis – sperm production. 4 sperm cells result from meiosis of a primary spermatocyte.

  • Spermiogenesis– process of sperm cell maturation.

  • Sperm cell parts:

    • Head

      • Contains the nucleus with 23 chromosomes

    • Midpiece

    • tail


Organs of the male reproductive system

Organs of the Male Reproductive System

  • Testes

    • Must descend (inguinal canal) in order to lower temperature for sperm production

    • Undescended testes cannot produce sperm cells

      *testes produce sperm cells and male sex hormones.


Structure of testes

Structure of Testes

  • Lobules separated by connective tissue

  • Filled with seminiferous tubules

  • Seminiferous tubules contain undifferentiated cells that give rise to sperm cells

  • Interstitial cells produce male sex hormones and are located between the seminiferous tubules.


Male internal accessory organs

Male Internal Accessory Organs

  • Epididymus

    • Located on the outside of the testis and leads to the ductusdeferentia

  • Ductusdeferentia

    • Muscular tube

    • Forms part of the spermatic cord

  • Seminal vesicles

    • Saclike structure attached to the ductus deferens

      • Secretes alkaline fluid that contains nutrients such as fructose that is added to sperm cells entering the ejaculatory duct.

  • Prostate gland

    • Surrounds the urethra just below the urinary bladder

    • Secretes thin, milky fluid which enhances sperm mobility and neutralizes the fluid containing the sperm cells and acidic secretions of the vagina.

  • Bulbourethral glands

    • Two small structures inferior to the prostate gland that secrete a fluid that lubricates the penis in preparation for sexual intercourse

  • Semen

    • Sperm cells and secretions of seminal vesicles, prostate gland, and bulbourethral glands.

    • Sperm cells in semen swim, but cannot fertilize the egg cell until they enter the female reproductive tract.


External reproductive organs

External Reproductive Organs

  • Scrotum

    • Pouch of skin and subcutaneous tissue that encloses the testes.

  • Penis

    • Conveys urine and semen

    • Becomes erect for insertion into the vagina during sexual intercourse

    • Body is composed of 3 columns of erectile tissue surrounded by connective tissue

    • Root of the penis is attached to the pelvic arch and membranes of the perineum.


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