The accessory glands, including the seminal vesicles and the prostate gland, provide fluids that lubricate the duct system and nourish the sperm.
The seminal vesicles are sac-like structures attached to the vas deferens to the side of the bladder.
The CDC recently released Dating Matters®: Interactive Guide on Informing Policy, the newest addition to CDC’s Dating Matters toolkit.
These genes come from the father's sperm and the mother's egg, which are produced by the male and female reproductive systems. Unlike the female, whose sex organs are located entirely within the pelvis, the male has reproductive organs, or genitals, that are both inside and outside the pelvis.
The male genitals include: In a guy who's reached sexual maturity, the two testicles (pronounced: TESS-tih-kulz), or testes (pronounced: TESS-teez), produce and store millions of tiny sperm cells.
Testosterone is a major part of puberty in guys, and as a guy makes his way through puberty, his testicles produce more and more of it.
Testosterone is the hormone that causes guys to develop deeper voices, bigger muscles, and body and facial hair, and it also stimulates the production of sperm.
This bag of skin helps to regulate the temperature of testicles, which need to be kept cooler than body temperature to produce sperm.