CHAPTER 12 Flashcards
1
Q
what provides support to the ECM
A
collagen
2
Q
defining animal charachterists
A
-sexual reproduction
-diploid life style
3
Q
4 embryo stages
A
- Fertilization
- Cleavage
- Gastrulation (in almost all animals)
- Organogenesis (in almost all animals)
4
Q
fertilization can be…
A
internal and external
5
Q
totipotent
A
the ability to divide and form an entire organism
6
Q
blastula
A
sphere of cells as a result of cleavage
7
Q
blastocoel
A
central cavity of blastula
8
Q
Archenteron
A
the inside of the Gastrulation thing
9
Q
Endoderm
A
second layer of the Gastrulation thing
10
Q
Blastocoel
A
third layer of the Gastrulation thing
11
Q
Ectoderm
A
outer layer of the Gastrulation thing
12
Q
Invagination
A
Sheet of cells bulges inward
13
Q
Involution
A
Sheet of cells rolls over itself
14
Q
Opening to archenteron is called…
A
blastopore
15
Q
blastopore develops into what
A
mouth and or booty
