1
Q
ectoderm
A
the epidermis of the skin nervous system teeth and jaws germ layer adrenal medulla sweat glands hair follicle the pituitary gland
2
Q
Mesoderm
A
dermis of the skin the skeletal system muscular system adrenal cortex excretory system reproductive ( except germ layer) the lymphatic system
3
Q
endoderm
A
epithelia of the digestive tract and associated organs
epithelial of respiratory and excretory and reproductive tract and ducts
thymus
thyroid
parathyroid
4
Q
body cavity
A
coelomates
pseudocoelomate
acoelomate
5
Q
coelomates
A
cavity covered with mesoderm
annelids
6
Q
pseudocoelomate
A
cavity covered with meso and endo
nematoda
7
Q
acoelomates
A
cavity filled with mesoderm
platyhelminthes
`
8
Q
protostome
- cleavage
- coelom formation
- fate of blastopore
A
molluscs
annelids
cleavage:
- spiral : planes of cell diagonal to vertical axis
- determinate : developmental fate of each cell determined
coelom formation
solid masses of cell split to form coelom
fate of blastopore
mouth
9
Q
deuterostome
- cleavage
- coelom formation
- fate of blastopore
A
echindermes
chordates
cleavage;
- radial : cleavage planes are parallel or perpendicular to vertical axis
- indeterminate; each cell can develop into fully formed and functional cell
coelom formation
mesoderm pinches off archenteron to form coelom
fate of blastopore
anus
