1.
accessory organs: have a supportive function; empty secretions into the ducts during ejaculation
2.
acrosome: a bag of digestive enzymes that helps to erode tissues surrounding the female egg cell
3.
androgens: male sex hormones, which testosterone is most abundant
4.
bulbourethral gland: small structures located inferior to the prostate that secrete mucus to lubricate the tip of the penis during sexual arousal
5.
cGMP enzyme: break down to parts, no erection
6.
ejaculation: forcing semen to the outside
7.
ejaculatory duct: where the discharge of sperm-containing semen from male urethra
8.
emission: movement of sperm cells and accessory gland secretions into the urethra
9.
epididymis: a tightly coiled tube lying adjacent to the testis and leading from the testis to the vas deferens
10.
epididymis and vas deferens: channels leading from the seminiferous tubules carry sperm to the
11.
erection: During sexual arousal, parasympathetic impulses trigger increased blood flow into the erectile tissues of the penis, producing an
12.
FSH: stimulates the supporting cells of the seminiferous tubules
13.
FSH and testosterone: stimulate spermatogenesis
14.
glans penis: The corpus spongiosum enlarges at its distal end to form the
15.
head: contain haploid nucleus
16.
Interstitial cells: lie between the semineferous tubules and produce male hormones
17.
LH: promotes the development of interstitial cells of the testes and they, in turn, secrete male hormones (testosterone)
18.
male and female reproductive systems: a series of glands and tubes that produce and nurture sex cells, and transport them to the site of fertilization
19.
male sex organs: designed to transport sperm to eggs
20.
midpiece: contain mitochondria; produce enough energy so the tail can propel forward
21.
penis: a cylindrical organ made up of specialized erectile tissue (corpora cavernosa and corpus spongiosum) and is designed to convey both urine and semen to the outside
22.
primary sex organs (gonads): produce sperm and hormones; produce sex cells (gametes)
23.
primary spermatocytes: undergo division by meiosis and form haploid secondary spermatocytes with 23 chromosomes
24.
prostate gland: surrounds the urethra at the base of the bladder
25.
scrotum: external sac that houses the testes
26.
secondary spermatocytes: divide again to form spermatids, each of which matures into a sperm cell
27.
semen: a combination of sperm cells (120 million per milliliter) and the secretions of the seminal vesicles, prostate gland, and bulbourethral glands
28.
seminal vesicle: a saclike structure attached to the vas deferens near the base of the urinary bladder
29.
seminiferous tubules: lines with stratifies epithelium that gives rise to sperm cells
30.
sperm cells: cannot fertilize an egg until they undergo capacitation within the female reproductive tract
31.
spermatogenesis: sequence of events that produces sperm in the seminiferous tubules of the testes
32.
spermatogonia: During spermatogenesis, ___________ enlarge and become primary spermatocytes
33.
tail: is a flagellum for movement
34.
testes: ovoid structures suspended by a spermatic cord in a scrotum; within the scrotum, produce sperm
35.
testosterone: secreted in a fetus until birth, and then not again until puberty, after which it is continuously secreted
36.
testosterone: also responsible for male secondary sexual characteristics (deep voice, body hair, thickening of the skin, and so forth)
37.
testosterone: stimulates the development of the male reproductive organs and causes the testes to descend
38.
vas deferens: a muscular tube 45 centimeters in length leading from the epididymis up into the body cavity to the ejaculatory duct, where it unites and empties its contents into the urethra
39.
viagra: blocks the enzyme to have an erection
