mechanisms of disease during embryogenesis Flashcards
1
Q
human development - 2 periods
A
embryonic period = up to end of week 8 and most of organogenesis occurs here
fetal period = remaining time in utero and involves growth and modelling
defects during embryogenesis result in congenital malformations
2
Q
mechanisms of development
A
fertilisation cleavage gastrulation neurulation and somitogeneiss organogenesis
3
Q
fertilisation
A
10 days
4
Q
what is morula
A
12-16 cells
day 3
inside cells = give rise to inner cell mass
blastocele - fluid, pushes inner set of muscle cells towards one side
5
Q
gastrulation
A
second stage
leads to formation of 3 layers of cells out from these bilayer structures
6
Q
first steps in neurulation
A
- specification of the CNS
