Morphogenesis Flashcards
1
Q
What are the 3 germ layers; what structures do they form?
A
Ectoderm: epidermis of skin, nervous system
Mesoderm: skeleton, muscle, kidney, heart, blood
Endoderm: gut, liver, lungs
2
Q
3 stages of gastrulation (in sea urchin)
A
- Movement of endoderm and mesoderm inside the embryo
- Formation of a gut
- Main body plan emerges
3
Q
Where do germ cells move?
A
To somatic tissue
4
Q
What does isolating blastomeres at the 4 cell stages in sea urchins result in?
A
4 small larvae
5
Q
What does isolation the animal/vegetal halves at the 8 cell stage result in?
A
Abnormal embryos
6
Q
Define neurulation
A
Formation of neural tube
Neural plate on embryo surface sinks to form a neural groove and the edges start to rise up and fuse togehter
