Echinodermata

What type of symmetry do echinoderms have?

pentamerous
What does the water-vascular system do?
- aids in locomotion
- aids in feeding
What do you call tube feet?

podia
What is the central area that extends the arms/rays of the organism?

central disk
Where can you find the podia?

ambulacral grooves
Where does water enter in the water-vascular system?

madreporite
What is the upper/smaller stomach called?

pyloric stomach
How much of the central disc must be cut off in order for a new sea star to form?

1/5
What are pedicellariae?

pincers
What does a starfish use for vision that is located at the end each arm?

ocelli
What can the cardiac stomach do?

extend out of the mouth to digest material
What is the order of the water-vascular system?
- 1. madreporite
- 2. stone canal
- 3. ring canal
- 4. radial canal
- 5. lateral canal
- 6. podia
What is the order of the digestive system?
- 1. mouth
- 2. cardiac stomach
- 3. pyloric stomach
- 4. intestine
- 5. anus
What are characteristics of the class Asteroidea?
- sea stars
- have open ambulacral grooves where tube feet help them move
What are characteristics of the class Ophiurodea?
- brittle stars
- have long thin arms with no organs in the arms
What are characteristics of the class Echinoidea?
- sea urchins
- have movable spines
What are characteristics of the class Holothuroidea?
- sea cucumbers
- have modified podia that form circumoral tentacles

Author

mecoop23

349719

Card Set

Echinodermata

Description

echinoderm test

Updated

2019-11-25T20:02:42Z