Exercise 40- Male Reproductive System

proper sperm production must occur at what temperature?

95° F (35° C)

a vasectomy is the cutting and tying of the two ductus deferens at the level of the spermatic cords. review the percent of sperm that composes semen and determine what effect a vasectomy has on semen volume

a vasectomy has no real effect on semen volume

where is the cremaster found?

attached to the testes; spermatic cord

list the functions of each structure: testis- corpus cavernosum- epididymis- prostate gland- bulbourethral gland-

corpus cavernosum- epididymis- prostate gland- bulbourethral gland-

what is the cylinder of erectile tissue ventral to the corpora cavernosa?

corpus spongiosum

name the layer in the scrotal sac that consists of a smooth muscle layer

dartos muscle

where do sperm move after being in the epididymis?

ductus deferens

the testes have both an endocrine and exocrine function. describe the endocrine and exocrine products that come from the testes

endocrine- testosterone produced in the interstitial cells exocrine- production of spermatozoa in the seminiferous tubules

where is the glans penis located?

expanded portion of the corpus spongiosum at the distal end of the penis

which one of the seminal fluid glands is not a paired gland?

prostate gland

name the three sections of the urethra and where they occur

prostatic urethra membranous urethra spongy urethra

what male reproductive gland is missing in the cat but present in the human?

seminal vesicles

what structure of the testis produces sperm?

seminiferous tubules

what cells initiate sperm production?

spermatogonia

list all the structures involved in producing semen

testes, seminal vesicles, prostate gland, and bulb of urethra

male sterility can result from excessively high temperatures around the testes. what adjustment is made to counteract the effects of high temperature?

the dartos relaxes and and the testes descend from the body, thus becoming cooler the cremaster contracts, bringing the testes closer to the body, increasing the temperature

what are the gonads in the male reproductive system?

the testes