| Term | Definition |
|---|
| Epididymus | Structure on top of each testis where sperm matures |
| Vas deferens | 18" long tubule that connects the epididymus to the urethra; conveys sperm during sexual arousal from the epididymus toward the urethraby peristaltic contractions; able to store sperm |
| Ejaculatory duct | Small tube that connects the vas deferens to the urethra; inside the prostate |
| Urethra | A small passageway for urine and semen |
| Prostatic urethra | Portion of the urethra that goes through the prostate |
| Membranous urethra | Small portion of the urethra that passes through muscle tissue |
| Spongy urethra | End portion of urethra that passes through the corpus spongiosum |
| Seminal vessicles | Paired glands located posterior to the bladder that secrete an alkaline fluid in order to neutralize the acidity in the urethra; contains fructose which provides energy for the sperm (ATP), as well as clotting proteins that cause sperm to clot ater it is ejaculated |
| Prostate | A golf ball sized gland below the bladder that secretes a milky, slightly acidic fluid; contains citric acid that is used to make ATP (Krebs cycle); contains enzymes that break down the clotting proteins in the seminal vessicle |
| Seminalplasmin | A prostatic fluid that is an an anitbiotic capable of destroying bacteria |
| Bulbourethral glands | Pair of pea-shaped glands located below the prostate on either side of the urethra; secretes mucus for lubrication of the urethra; alkaline pH, which also aids in buffering |
| Semen | A mixture of sperm and seminal fluid that is slight alkaline (7.2-7.7 pH); volume within a normal ejaculation is 2.5-5.0mL; 50-150 million sperm per mL |
| Infertile | Any number below 20 million sperm per mL of semen |
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