Practicum 3 Flashcards
1
Q
Deuterstome Animals
A
- 3 Phyla
- Triploblastic
- Eucoelomates
- Radial Cleavage
2
Q
3 Phyla of Deuterstomes
A
- Echinodermata
- Hemichordata
- Chordata
3
Q
Phylum Echinodermata Characteristics
A
- “spiny-skinned”
- secondary radial symmetry
- oral and aboral surfaces
- pentamerous
- CaCO3 exoskeleton
- water vascular system
- complete tubular digestive system
- dioecious, not sexually dimorphic
- nervous system
4
Q
Echinodermata Symmetry
A
- larvae: bilateral
- adult: radial
5
Q
Echinodermata Nervous System
A
- nerve ring
- nerve net
- radial nerves
6
Q
Echinodermata Water Vascular System
A
- can be used for movement
7
Q
Echinodermata Classes
A
- Astroidea
- Ophiuredia
- Holothuroidea
- Echinoidea
- Crinoidea
- Concentricycloidea
8
Q
Echinodermata Examples
A
- sea cucumber
- sea lilly
- feather star
- sea urchins
- brittle star
- sea daisy
9
Q
Class Astroidea
A
- classic sea stars
- central disk with radiating arms
- maderporite on aboral surface
- regenerative properties; rays
- pyloric caecum; pancreatic and digestive like
10
Q
Maderporite
A
- draws and expels water for the water vascular system
11
Q
Class Ophiuredia
A
- brittle star
- basket star
- maderporite on oral surface
- no intestine
12
Q
Class Holothuroidea
A
- sea cucumber
- five rows of tube feet
- evisceration
13
Q
Class Echinoidea
A
- sea urchins
- sea biscuits
- sand dollars
- lack arms but are pentamerous
14
Q
Class Crinoidea
A
- sea lilies
- sea feathers
- resembles upside-down starfish with oral surface up
- sessile as adults
15
Q
Class Concentricycloidea
A
- sea daisy
- new class
- discovered in 1990
