Prenatal development Flashcards
1
Q
Zygote
A
First two weeks after fertilization
2
Q
Embryo
A
2-12 weeks.
3
Q
Foetus
A
12 to birth
4
Q
Morula
A
day 3. ball of 16 cells, not omnipotent anymore
5
Q
Blastula
A
4-7 days, cavity arises and implantation in the uterus
6
Q
Gastrulation
A
Week 2. Formation of 3 germ layers.
Ectoderm: skin, hair and NS (most important)
Mesoderm: muscles and bones
Endoderm: most other organs
7
Q
Neuralation
A
Start week 3, development of neural plate, groove and tube from the ectoderm. Out of the neural tube your brain develops.
8
Q
Fail of neural tube
A
Anecephaly/open skull
Spina bifida/open back
