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37 Cards in this Set
- Front
- Back
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gametes |
• sex cells • sperm (in males) • oocytes (in females) |
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special type of cell division that leads to formation of sex cells |
meiosis |
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how many chromosome does each sperm and oocytes contain |
23 |
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chromosome become visible chromatids |
early prophase 1 |
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pair of chromosomes synapse. crossing over may occur at this stage |
middle prophase 1 |
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pairs of chromosomes align along the center of the cell. |
metaphase 1 |
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union of sperm and oocyte |
fertilization |
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what develops after fertilization |
zygote |
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how many days does it take before a zygote develops into an embryo after fertilization |
3-14 days after fertilization |
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how long does is take to become an embryo after fertilization |
14-56 days |
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how many days after fertilization before it becomes a fetus |
56 days |
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function of male reproductice organs |
• produce sperm cells • produce male sex hormones • transfer sperm cells to female |
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contains testes |
scrotum |
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muscle that moves scrotum and testes close to and away from body depending on temp. |
dartos muscle |
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at what temperature does sperm cells develop |
less than body temp. |
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primary male reproductive organ |
testes |
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• produces sperm • in scrotum |
testes |
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part of testes where sperm is produced |
seminiferous tubules |
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part of testes that secretes testosterone hormone |
interstitial cells |
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begin of sperm cells |
germ cells |
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nourish germ cells and produce hormones |
sustentacular cells |
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• thread-like tubules on side of each testes • where seminiferous tubules empty new sperm • where sperm continue to mature develop ability to swim and bind oocytes |
epididymis |
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"vas deferens" |
ductus deferens |
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extends from epididymis and joins seminal vesicle |
ductus deferens |
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what do you call the procedure of cutting and tying vas deferens |
vasectomy |
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• extends from urinary bladder to end of penis • passageway for urine and male reproductive fluids |
urethra |
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• transfer sperm from male to female • excrete urine |
penis |
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3 columns of erectile tissue which fill with blood for erection |
corporus cavernosum, corpus spongiosum, spongy urethra |
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next to ductus deferens, help form ejaculatory duct |
seminal vesicle |
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• surrounds urethra • size of a walnut |
prostate gland |
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small mucus secreting glands near base of prostate gland |
bulbourethral gland |
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• mixture of sperm and secretion from glands • provides a transport medium and nutrients that protect and activate cell |
semen |
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percentage of semen's fluid |
60% (seminal vesicles) 30% (prostate gland) 5% (bulbourethral gland) 5% (testes) |
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provide fructose |
seminal vesicles |
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• contains enzymes to liquefy semen after it is inside female • neutralizes acidity of vagina |
prostate gland |
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neutralizes acidity of male urethra and female vagina |
bulbourethral gland |
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path of sperm |
• sperm develon in seminiferous tubules (testes) • epididymis (mature) • ductus deferens • receive secretion from seminal vesicles, prostate gland and bulbourethral gland • urethra where semen (sperm) exit the body |
