Prenatal development

Question 1

Zygote

Answer 1

First two weeks after fertilization

Question 2

Embryo

Answer 2

2-12 weeks.

Question 3

Foetus

Answer 3

12 to birth

Question 4

Morula

Answer 4

day 3. ball of 16 cells, not omnipotent anymore

Question 5

Blastula

Answer 5

4-7 days, cavity arises and implantation in the uterus

Question 6

Gastrulation

Answer 6

Week 2. Formation of 3 germ layers.

Ectoderm: skin, hair and NS (most important)

Mesoderm: muscles and bones

Endoderm: most other organs

Question 7

Neuralation

Answer 7

Start week 3, development of neural plate, groove and tube from the ectoderm. Out of the neural tube your brain develops.

Question 8

Fail of neural tube

Answer 8

Anecephaly/open skull

Spina bifida/open back