| A | B |
| Testicles | The male sex glad that produces sperm and testosterone. |
| Sperm | Male sex cells |
| Seminiferous Tubules | Minute tubules in the testicles in which sperm are produced. They compromise about 90% of the mass of the testes |
| Epididymis | The long, coiled tubule leading from the testis to the vas deferens. |
| Vas Deferens | Duct that carries sperm from the epididymis to the urethra. |
| Ampulla | The dilated or enlarged upper proportion of the vas deferens in bulls, bucks, and rams, where sperm is stored for sudden release at ejaculation. |
| Urethra | Large muscular canal extending from the urinary bladder. |
| Penis | Serves as a channel for passage of urine from bladder as an extension of the urethra. It is an copulatory organ through which sperm are deposited into female reproductive system. |
| Testosterone | Conditions the male sso that his appearance and behavior are masculine. |