Ch. 32 Bio Flashcards
What are the 8 characteristics of animals?
- Multicellular
- Heterotroph
- Cells lack cell walls
- Most have nerves, muscles, capacity to move at some point in the life cycle
- Ability to reproduce sexually
- Specialized sensory structures and nervous system
- Cells exist in extensive extracellular matrix
- Unique cell junctions
When classifying animals what are the morphological and developmental features used?
- Presence or absence of different tissue types
- Type of body symmetry
- Number of germ layers
- Presence or absence of a true body cavity
- Patterns of embryonic development
What do para- and zoa- mean?
Para- means along side
Zoa- animals
Under tissues (1) what are all animals classified under?
Metazoa
What subkingdom are animals in if they have no specialized tissues or organs? (1)
Parazoa
What is a subcategory of parazoa?
Sponges; bearing pores
What subkingdom are animals in if they have more than one type of tissue and organs?
Eumetazoa
Meta- means?
After or along with; Change
Eu- means?
True
What are the three types of symmetry that an animal can have?
No symmetry
Radial symmetry
Bilateral symmetry
What type of symmetry do Eumetazoa have?
Radially symmetrical (Radiata) or
Bilaterally symmetrical (Bilateria)
What kind of ends do bilateral animals have?
Cephalization
Dorsal
Ventral (Ends)
How many germ layers do bilateral animals have?
3 germ layers;
eco-
meso-
edoderm
What sides do radial animals have?
Oral and aboral sides
How many germ layers do radial animals have?
2 germ layers; ecto-, endoderm
lateral means?
cephal- means?
side to side
head
Bilateria are ______
triploblastic - 3 germ layers
Radiata are ______
diploblastic - 2 layers
Cell layers develop during ______?
Gastrulation
What is the inner layer of a germ layer called?
endoderm
What is the outer layer of the germ layer called?
ectoderm
The _______ is the 3rd germ layer in bilateral animals?
Mesoderm, it can form muscles and most other organs
What are the steps in order to get in the cell cycle to get to gastrulation?
Zygote ->
Cleavage ->
8 cell stage (Morula) ->
Cleavage ->
Blastula (hollow ball) ->
Gastrulation ->
Arche - means
Entero - means
old, primative
intestine
