Male Reporductive System Flashcards Preview

Biology 101 > Male Reporductive System > Flashcards

Flashcards in Male Reporductive System Deck (19)
1

male reproductive system

comprised of the testes, a ductal system and accessory sex glands

2

testes

two oval shaped organs that lie outside the abdominal cavity within the scrotum; produce sperm and secrete hormones

3

scrotum

sac like structure suspended outside the body inferior to the pubic segments

4

gamete

male of female reproductive cell

5

sperm

mature male reproductive cell

6

spermatogenesis

process by which sperm is produced
usually takes about 65 to 75 days for completion
once completion sperm cells will have 23 chromosomes instead of 46

7

seminiferous tubules

tightly coiled ducts located within the testes where sperm are produces

8

testosterone

produce testosterone
before birth, it stimulates development of external genital
brings about development and enlargement of the male sex organs and development of masculine secondary sex characteristics
contributes to male sex drive and behavior

9

ducts

responsible for storing and transporting sperm
epididymis, ductus deferens, ejaculatory ducts, urethra

10

epididymis

comma shaped organ that lies along the posterior border of each testis
after sperm is produces within the seminiferous tubules it is transported
sperm is mature in 10 to 14 days and can be stored for several months
upon maturity the sperm have increases motility and the ability to fertilize and ovum
propels the sperm by peristalsis in the ductus deferenes during sexual arousal

11

ductal deferens

stores sperm for several months
conveys sperm toward the urethra by peristaltic contractions
the dilated terminal end is known as the ampulla

12

ejaculatory duct

formed by the union of the seminal vesicles and the ampulla of the ductus deferens
ejects sperms and secretions from the seminal vesicles into the urethra just before ejaculation

13

urethra

shared by the reproductive and urinary systems because it serves as a passageway for semen and urine to exit the body
divided into three portions: prostate, membranous urethra, penile urethra

14

prostate urethra

proximate portion - passes through the prostate gland

15

membranous urethra

middle portion

16

penile urethra

distal portion - travels the length of the external penis

17

accessory glands

responsible for secreting most of the liquid portion of semen - semen and seminal vesicles

18

semen

mixture of sperm and secretions of seminiferous tubules, seminal vesicles, prostate gland and bulourethral glands

19

seminal vesicles

irregularly shaped sacs located posterior to the base of the bladder