reproduction - males Flashcards

(15 cards)

1
Q

what are the male chromosomes in mammals

A

xy

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1
Q

structure and function of testes

A

sits inside scrotum
produces sperm and testosterone

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2
Q

structure and function of epididymis

A

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

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3
Q

structure and function of vasdeferens

A

tube leading out of epididymis
transports sperm to urethra

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4
Q

structure and function of the prostate gland

A

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

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5
Q

structure and function of urethra

A

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

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6
Q

structure and function of bulbus glandus

A

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

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7
Q

structure and function of prepuce

A

(foreskin)
layers of skin
protects penis

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8
Q

structure and function of the penis

A

varies between species, often includes a baculum
allows for penetration

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9
Q

where is sperm made

A

seminiferous tubule walls

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10
Q

what cells provide nutrients and blood to immature sperm cells

A

sertoli cells

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11
Q

how do sperm cells divide

A

meiosis

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12
Q

outline the process of sperm production

A
  • 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
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13
Q

what are the male chromosomes in birds

A

zz

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14
Q

how to tell which animals are male

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