1. Macho Male Reproductive System
Biology

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

3. Side View of Male Reproductive System

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

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

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

7. SEMINIFEROUS TUBULES 700 feet
Spermatogenesis happens here. It takes days!

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

9. 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

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

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

12. 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

13. EJACULATION 2-6 ml of semen 120 million sperm per ml
~ million sperm per ejaculation…WHOA!
They live for hrs

14. Sperm Factory Problems
Alcohol
Tobacco
Marijuana
Radiation
Pesticides
Antibiotics
Environmental Changes

15. 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