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Cards In This Set
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Egg - ___ ____ - where hormones are released and ____ prepares itself
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Egg - corpus luteum - where hormones are released and uterus prepares itself
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First two weeks - most ___ stage of development
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First two weeks - most rapid stage of development
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First two weeks - complex interaction between ___ and ____
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First two weeks - complex interaction between heredity and environment
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Egg only lasts __ hours; sperm lasts ___ days
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Egg only lasts 24 hours; sperm lasts 6 days
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List 3 periods of development
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Period of the Zygote
Period of Embryonic Development Fetal Period of Development |
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Period of the Zygote:
- starts at moment of ____ and ends at end of ___ week when fertilized egg... - ___% of zygotes don't survive this period - ___ and ____ begin to form; keep mom and baby's ___ from ____ - umbilical cord has __ arteries and __ veins |
- starts at moment of conception and end at end of 2nd week when fertilized egg has attached to uterine wall
- 30% of zygotes don't survive this period - umbilical cord and placenta begin to form; keep mom and baby's blood from mixing - umbilical cord has 2 arteries and 1 vein |
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Umbilical cord arteries carry ___ ___ the baby and veins carry ___ ___ the baby
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Umbilical cord arteries carry waste away from the baby and veins carry nutrients to the baby
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Period of Embryonic Development:
- lasts __ weeks: from ____ to ____ - Groundwork for ___ ___ ___ and body ____ being laid out - "_____" for body being made - embryo very ____ - second month - ___, ____, ect. forming |
-lasts 6 weeks: from week 2 to week 8
-groundwork for all major organismcs and body being laid out - "blueprint" for body being made - embryo very vulnerable - second month - ears, eyes, nose etc. forming |
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Period of Embryonic Development:
- _____ trend of development means... - _____ tread of development means.... - _____ organs developing - ___ ___ get absorbed by end of this period -changes in body ____ |
- Cephalocaudal trend of development means - things develop from top to bottom (head to foot)
- Proximodistal means - things develop from inside out - internal organs developing - yolk sac gets absorbed by end of this period - changes in body position |
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Period of Embyonic Development:
- Embryo ___ inches long, can ___/___ with mouth especially - baby can ___ on its own - period mom starts to report ____ |
- Embryo 1 inch long, can feel/touch with mouth especiallys
- baby can move on its own -period mom starts to report morning sickness |
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Fetal Period of Development:
- _____ period of development - week __ to ____ - ___ and finishing phase of development - incredible ___ spurt between weeks ___ and ___ - ___ month - organs, muscles, ____ system become fully developed/formed/organized |
- longest period of development
- week 9 to birth - growth and finishing phase of development - incredible growth spurt between weeks 9 and 28 - 3rd month - organs, muscles, nervous system become fully developed/formed/organized |
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Fetal Period of Development:
- Movements -____, ____, can suck ___ - ___ week - genitals form - finishing touches - ____, tooth buds, ____/____ -end ___ month - ___ trimester complete |
- Movements - growing, kicking, can suck thumb
- 12th week - genitals form - finishing touches - eyelids, tooth buds, fingernails/toenails - end third month - 1st trimester complete |
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2nd trimester: (___-___ weeks) - mom can feel ____
- ___ has formed - ____ - white, cheeselike substance covers fetus to protect skin from being _____ - ____ -downlike hair that covers fetus allowing fetus to hold onto it, used to protect from chapping |
(17-20 weeks) - mom can feel movement
- skin has formed - VERNIX - white, cheeselike substance that covers fetus to protect skin from being chapped - LAGUNO - downlike hair that covers fetus allowing fetus to hold onti it, used to protect form chapping |
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By end of 2nd trimester - nearly all ___ in ___ have been created
-fetus born at this time could not survive (___ and ___ not mature enough) |
By end of 2nd trimester - nearly all neurons in brain have been created
-fetus born at this time could not survive (lungs and brain not mature enough) |
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3rd trimester- (___ to ___ weeks); age of _____; could survive with ______; ____ mature enough
-longer baby stays in womb, better outcome occurs -brain continues to make strides, developing ____ which.... - max ___ growth - fetus spending more time ____,scheduels, activity (relates to activity level as _____) |
3rd trimester - (22-26 weeks); age of viability; could survive with intervention; brain mature enough
- longer baby stays in womb, better outcome occurs - brain continues to make strides, developing grooves which maximize surface area - max brain growth -fetus spending more time awake, schedules, activity (relates to activity level as infant) |
