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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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.
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
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.