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