Macho Male Reproductive System Biology

Macho Male Reproductive System Produces, stores, and releases SPERM!

Side View of Male Reproductive System

TESTES Main male sex organ Located outside the body in the scrotum Makes sperm!

TESTES (cont.) Scrotum provides a temperature about 3 degrees lower than the body temp. The lower temp is necessary to produce normal sperm

TESTES (cont.) Releases TESTOSTERONE! Deepening of voice Increase hair all over body Enlargement of skeletal muscles Thickening of bones

SEMINIFEROUS TUBULES 700 feet Spermatogenesis happens here. It takes 64-72 days!

Seminiferous tubules connect to the EPIDIDYMUS (20 ft) Sperm matures there Cytoplasm trimmed off Tail grows Acrosome on head (lysosome)

SEMEN - Fluid from three glands Bulbourethral (Cowper’s) Gland Fluid First to pass through the penis Cleanses the acidic urine left in the penis Lubricates the penis

SEMEN - Fluid from three glands Seminal Vesicle Fluid Regulates the pH Energy rich Stimulates the muscular contraction in the female

SEMEN - Fluid from three glands Prostate Gland Fluid Neutralizes the acidic environment of the vagina

When a male is sexually stimulated… The epididymus contracts and expels sperm into the…. Vas Deferens The sperm travel down the 45 cm tube to the urethra picking up the seminal fluid as it goes Urethra The semen and sperm are released from this tube through the end of the penis Only urine and sperm can pass through the urethra

EJACULATION 2-6 ml of semen 120 million sperm per ml ~240-720 million sperm per ejaculation…WHOA! They live for 48-72 hrs

Sperm Factory Problems Alcohol Tobacco Marijuana Radiation Pesticides Antibiotics Environmental Changes

Vasectomy… The vas deferens is cut & stitched, clamped, or sealed Everything is the same but the sperm are not released with the semen The sperm are reabsorbed by the body