Exam #2 Short Answer pt. 2 Flashcards
What are the three main stages of prenatal period?
- germinal
- embryonic
- fetal
The _________ stage occurs from 0 to 2 weeks.
germinal
The germinal stage occurs from __ to __ weeks.
0
2
The embryonic stage occurs from __ weeks to __ months.
2
2
The _________ stage occurs from 2 weeks to 2 months.
embryonic
The ______ stage occurs from 2 months to birth.
fetal
The fetal stage occurs from __ months to birth.
2
What organs are formed during the germinal stage?
- initially formed cell begins to rapidly divide and multiply
- zygote migrates to uterus and implants on wall
- placenta is formed
What organs are formed during the embryonic stage?
- most of vital organs (heart, spine, brain) form
- embryo at about 2 weeks, neural tube just formed
What organs are formed during the fetal stage?
- muscles and bones develop
- sex organs develop in the 3rd month
- auditory system (peripheral) developed around 6 mo.
- neural development continues
What is the age of viability?
the point in which a baby can live outside of the womb
The age of viability occurs from __ to __ weeks
23
26
- 23 weeks ___% survival, if born prematurely
- 26 weeks 75% survival, if born prematurely
50%
- 23 weeks 50% survival, if born prematurely
- ___ weeks 75% survival, if born prematurely
26
- ___ weeks 50% survival, if born prematurely
- 26 weeks 75% survival, if born prematurely
23