Ch.10 Classification Flashcards
1
Q
Porifera - nerves
A
Have no nerves or muscles; sessile
2
Q
Porifera - central cavity
A
Filter nutrients from water drawn into a central cavity, spongocoel
3
Q
Porifera - cell layers
A
Consist of two cell layers only : ectoderm and endoderm connected by noncellular mesoglea
4
Q
Porifera - true cells and organs
A
No true tissues or organs although they have different types of cells.
5
Q
Porifera cells - Choanocyte
A
Collar cells, line the body cavity and have flagella that circulate water
6
Q
Porifera- the sponges , invertebrates - symmetry
A
No symmetry
