reproduction - males

Question 1

what are the male chromosomes in mammals

Answer 1

xy

Question 1

structure and function of testes

Answer 1

sits inside scrotum
produces sperm and testosterone

Question 2

structure and function of epididymis

Answer 2

long coiled tube on each testicles surface
mature sperm are stored here

Question 3

structure and function of vasdeferens

Answer 3

tube leading out of epididymis
transports sperm to urethra

Question 4

structure and function of the prostate gland

Answer 4

surrounds urethra, ball like
secretes clear liquid which nourishes and protects sperm by removing bacteria

Question 5

structure and function of urethra

Answer 5

muscular tube from bladder and prostate to tip of penis
transports urine and semen out of body

Question 6

structure and function of bulbus glandus

Answer 6

erectile tissue that swells during mating
to form a lock after penetration

Question 7

structure and function of prepuce

Answer 7

(foreskin)
layers of skin
protects penis

Question 8

structure and function of the penis

Answer 8

varies between species, often includes a baculum
allows for penetration

Question 9

where is sperm made

Answer 9

seminiferous tubule walls

Question 10

what cells provide nutrients and blood to immature sperm cells

Answer 10

sertoli cells

Question 11

how do sperm cells divide

Answer 11

meiosis

Question 12

outline the process of sperm production

Answer 12

• made in seminiferous tubules
• scattered sertoli cells provide blood and nutrients to immature sperm cells
• sertoli cells move young germ cells from the outer surface to the central channel of the tubule
• multiply by meiosis, half remain as stem cells and half become sperm cells with half their chromosomes
• maturing sperm change shape

Question 13

what are the male chromosomes in birds

Answer 13

zz

Question 14

how to tell which animals are male

Answer 14

• chromosones
• temperature sex dependant in turtles and crocodiles
• penis
• hormones