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Male Reproduction. Testosterone : Male sex hormone ~Testosterone causes the production of sperm. Sperm : Male reproduction cell ~ Two biological functions of the male reproduction system : 1.Production of sperm 2. Transfer of sperm to the female body during intercourse. External Organs

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male reproduction
Male Reproduction
  • Testosterone: Male sex hormone
  • ~Testosterone causes the production of sperm.
  • Sperm: Male reproduction cell
  • ~Two biological functions of the male reproduction system:
  • 1.Production of sperm
  • 2. Transfer of sperm to the female body during intercourse

External Organs

Penis: Tube-like organ attached to the trunk of the body just above testes.

~Functions: Sexual reproduction, sexual pleasure and elimination of waste.

Scrotum: Protects sperm by keeping the testes 3-4 degrees below normal body temperature.

~If the temp. rises, the muscles of the scrotum relax, lowering the testes.

~If the temp. drops, muscles contract, pulling testes closer to the body.

Erectile Tissue:Tissue that becomes engorged with blood.


Internal Organs

Epididymis: Stores newly produced sperm for about 64 days until fully matured.

Vas Deferens :A pair of connecting tubes, each 18 inches long that lead up into the males’ body toward other internal organs.

~ Thick muscle walls of the Vas Deferens propel the sperm forward.

Seminal Vesicles: Attached near the base of the bladder to the Vas Deferens.

~The fluid contains nutrients and mixes w/ sperm.

Prostate Gland:Small gland that surrounds Urethra.

Cowpers Gland:Two pea –sized glands that open into Urethra, secrete a clear sticky fluid to cleanse the urethra of urine and left over sperm.

Urethra: Tube-like organ that travels through the penis, carries sperm and urine.

~Semen and urine do not pass through the body at same time.

~A muscle near the bladder contracts, preventing urine from entering urethra.


Ejaculation: Fluid from prostate, fluid from seminal vesicles and 300-400 million sperm all combine to make semen

  • Semen: a thick fluid containing sperm and other secretions from male reproduction organs.
  • Fertilization: Is the union of a reproduction cell from a male and one from a female.
  • Foreskin-penis is covered w/ a fold of skin at birth.
  • Circumcision: Surgical removal of the foreskin of the penis.

Male Concerns

Hernia: Part of the body pushes through the muscle wall normally keeping it in.

(Example: Inguinal Hernia- part of the intestine pushes through into scrotum. *Surgery is need to correct.)

Sterility: Sperm is weak, malformed, sparse or nonexistent. Fertilization does not occur.

~Causes- Exposure to chemicals, smoking, STD’s, malfunction of one of the internal organs.

Prostate Cancer: Uncontrolled growth of cells.

~Treatments- Removal of prostate or radiation therapy and hormonal therapy.

Testicular Cancer:Signs- Enlargement of testicles, lump or fluid collection, dull ache in the lower abdominal or groin area.

~Frequently males 15-35.


Preventing problems

  • Prevent STD’s
  • Prevent jock itch
  • Prevent Trauma (wear a sports cup)
  • Prevent hernias (caused by straining to push or lift something, heavy coughing or sneezing)
  • Prevent infertility