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The Male Reproductive System: Key Notes and Functions

Explore the intricacies of the male reproductive system, from the role of testes in sperm development to the functions of ducts and glands. Learn about spermatogenesis and the anatomy of the penis. This comprehensive overview will enhance your understanding of male reproductive health.

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The Male Reproductive System: Key Notes and Functions

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  1. Anatomy Male Reproductive System

  2. NOTES – THE REPRODUCTIVE SYSTEM • The Male Reproductive System • contains testes – hangs outside body to regulate temperature • Scrotum • smooth muscle can raise or lower it

  3. Testes • contain seminiferous tubules – sperm develops here • interstitial cells surround tubules – secrete testosterone (male hormone)

  4. Spermatogenesis • formation of sperm cells

  5. Germ cells near the outer wall of the seminiferous tubules of the testis differentiate into stem cells called spermatogonia. • Spermatogonia

  6. Primary Spermatocyte • Follicle Stimulating Hormone (FSH) during puberty causes production of this cell • this cell undergoes meiosis

  7. gamete formed by this process – ½ the number of chromosomes • Spermatids

  8. Here is a microscopic view of the seminiferous tubules – notice the location of each cell, from the edge of the tube moving toward the center

  9. Mature Sperm • ultimate result is a sperm cell with a head, midpiece and tail

  10. Ducts • Epididymis • maturation & storage of sperm • located above and behind the testicle

  11. Ductus (vas) deferens • carries sperm from the epididymis to the urethra

  12. Urethra • extends from bladder to distal end of the penis

  13. Penis • composed of 3 columns of erectile tissue – delivers sperm to female • Corpora Cavernosa • 2 dorsal columns • ventral column – also forms the glans penis • Corpus Spongiosum • Prepuce (foreskin) • circumcision: removal of prepuce

  14. Glands • add nutrients to semen • Seminal vesicles

  15. Prostate gland • provide proper pH for sperm

  16. Bulbourethral Gland or Cowper’s Gland • lubricate urethra

  17. Secretions • Semen • mixture of sperm and secretions from glands • Ejaculation • forceful expulsion of semen from urethra (smooth and skeletal muscles)

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