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Name the parts of the male reproductive system. Describe sperm production, storage and function.

Name the parts of the male reproductive system. Describe sperm production, storage and function. Understand the function of hormones in the male reproductive system. KEY WORDS Scrotum Epididymis Vas deferens Prostate gland Semen Testosterone Puberty Urethra Hypothalamus

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Name the parts of the male reproductive system. Describe sperm production, storage and function.

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  1. Name the parts of the male reproductive system. • Describe sperm production, storage and function. • Understand the function of hormones in the male reproductive system.

  2. KEY WORDS Scrotum Epididymis Vas deferensProstate gland Semen Testosterone Puberty Urethra Hypothalamus Seminiferous tubules Seminal vesiclePituitary gland Cowper’s Gland LH and FSH

  3. Male reproductive system must both: • Produce sperm. • Pass sperm on to female – sexualintercourse. Male symbol represents the shield and spear of Mars - Roman god of war.

  4. Male sex organs: Bladder Seminal Vesicle Vas Deferens Prostate Cowper’s Gland Penis Epididymus Urethra Testes Scrotum

  5. Holds the testes externally (outside). Providing a cooler environment for healthy sperm. Scrotum Testes Contains tiny tubes - seminiferous tubules that produce 300 to 500 million sperm per day. Storage place where sperm are kept until they leave the body. Epididymis Carries sperm from epididymis to the urethra. Vas deferens Carries both sperm and urine through the penis. Bladder has a small valve that stops urine during ejaculation. Urethra 3 glands together make fluid called semen. Semen contains nutrients that give sperm energy to swim from the male and unite with an egg in the female. Prostate gland / Seminal vesicle / Cowper’s gland

  6. Sperm • Made in seminiferous tubules. • Stored in the epididymis. • Travel through Vas deferens to the urethra. • Ejaculated into female to find egg. Head: -contains chromosomes - contains chemicals for entering egg. Tail: - provides mobility, propelling sperm forward.

  7. Male gametes:

  8. Male sex hormones: • Hormones are chemicals that help body parts talk to each other and are essential for proper functioning of the system. • Male and female embryos identical until the seventh week of growth. • At seventh week a hormone is released by the brain instructing embryo to produce male (or female) sexual structures.

  9. Sex organs remain nonfunctioning until the offspring reach puberty. • Puberty: • Brain instructs body to begin rapid growth and reach sexual maturity. • Brain begins production of male sex hormones called androgens.

  10. In the brain: • Hypothalamus releases a hormone to the pituitary gland. • Causes Pituitary gland to release two hormones abbreviated LHandFSH. • LHtravels to the testes, stimulates cells to produce hormone testosterone – outside changes. • FSH combines with testosterone to stimulate the production of sperm – inside changes.

  11. The Male reproductive system: • Provides for the production and storage of sperm. • Structure of male reproductive system is established at the seventh week development. • Nonfunctioning until puberty. • Hypothalamus signals the pituitary gland to release LH and FSH to the testes. • Testosterone is responsible for all changes.

  12. Male sex organs: Bladder Seminal Vesicle Vas Deferens Prostate Cowper’s Gland Penis Epididymus Urethra Testes Scrotum

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