Prenatal Development

Question 1

Germinal period

Answer 1

First two weeks
Continuing cell development
Attachment of the zygote to the uterine wall 10-14 days after conception

Question 2

Embryonic period

Answer 2

Week 2-8
Cell differentiation intensifies
Organ formation starts

Question 3

Amnion

Answer 3

Bag like fluid that protects embryo umbilical cord

Question 4

Umbilical cord

Answer 4

Connects embryo to placenta, 2 arteries,1 vein

Question 5

Placenta

Answer 5

Small blood vessels from mother and embryo intertwine but do not join
Molecules pass back and fourth: oxygen, water, food, cO2, digestive wastes

Question 6

Fetal period

Answer 6

Growth and development continue

At 7 months fetal is visible and can survive outside of womb