bio quiz #12

puberty

• a period of rapid growth and sexual maturity

• the reproductive system becomes fully functional

• begins in the brain

testes

• male gonads

• produce testosterone

• located in the scrotum

• produce sperm

• consists of coiled tubules called seminiferous tubules

testosterone

• causes the deepening of the voice

• increased facial/body hair

• skeletal growth

• sex drive/aggression

• sperm production

scrotum

• external pouch

• functions to keep the testes a few degrees cooler than the body which is important for sperm production

seminiferous tubules

• the sight of sperm production

• contain many diploid cells that undergo meiosis to produce sperm nuclei

head

• contains a highly condensed nucleus

• has 23 chromosomes in humans

• the tip has a small cap containing enzymes vital to fertilization

midpiece

• contains many mitochondria

tail

• a flagellum

• a long, whip-like structure that propels the sperm forward

epididymis

• coiled tube on top of the (testes)

vas deferens

• tubes that carry the sperm from the (epididymis) to the (urethra)