| A | B |
|---|
| testicles | Produce sperm and male hormone testosterone |
| Sperm | Male sex cells |
| Testosterone | causes the appearance and behavior of the animal to have masculine traits |
| epididymis | Sperm is stored there while they mature |
| scrotum | two-lobed sac that contains and protects the two testicles. |
| vas deferens | transportation tube that carries the sperm-containing fluid from each epididymis to the urethra |
| urethra | large, muscular canal extending from the urinary bladder to the end of the penis. |
| seminal vesicles | open into the urethra to produce a fluid that protects and transports sperm. |
| prostate gland | It produces a fluid that mixes with the seminal fluid throughout animal reproduction. |
| Cowper’s gland | produces a fluid that cleans and neutralizes the urethra |
| penis | deposits the semen within the female reproductive system. |
| copulation | mating |
| sigmoid flexure | works with the retractor muscle to extend the penis in bulls, rams and boars |
| retractor muscle | works with the sigmoid flexure to extend the penis in bulls, rams and boars |
| sheath | tubular fold of skin. |
