male reproductive system

Question 1

what are the external structures ?

Answer 1

penis
scrotum
epididymis
testes

Question 2

what are the internal structures ?

Answer 2

vas deferens
seminal vesicle
prostate gland

Question 3

what is the function f the penis?

Answer 3

both semen and urine leave the penis through the urethra

sperm must be in an aquatic environment
seminal fluid is added to mature sperm to allow this

Question 4

what is the function of the scrotum?

Answer 4

maintenance of temperature of the testes - sperm require lower than normal body temperature to develop

scrotal wall muscles contract and relax to move the testes towards and away from the body.

Question 5

what is the function of the epididymis ?

Answer 5

spermatoza collected prior to ejaculation

motility(mobility) of sperm improves in epididymis

cell size changes ion conc changes, PH changes

Question 6

what is the function of the testes ?

Answer 6

seminiferous tubules ( approx 1000 per testis)

spermatogenesis occurs

produces testosterone

development of male secondary sexual characteristics.