What type of symmetry do echinoderms have?
What does the water-vascular system do?
aids in locomotion
aids in feeding
What do you call tube feet?
What is the central area that extends the arms/rays of the organism?
Where can you find the podia?
Where does water enter in the water-vascular system?
What is the upper/smaller stomach called?
How much of the central disc must be cut off in order for a new sea star to form?
What are pedicellariae?
What does a starfish use for vision that is located at the end each arm?
What can the cardiac stomach do?
extend out of the mouth to digest material
What is the order of the water-vascular system?
2. stone canal
3. ring canal
4. radial canal
5. lateral canal
What is the order of the digestive system?
2. cardiac stomach
3. pyloric stomach
What are characteristics of the class Asteroidea?
have open ambulacral grooves where tube feet help them move
What are characteristics of the class Ophiurodea?
have long thin arms with no organs in the arms
What are characteristics of the class Echinoidea?
have movable spines
What are characteristics of the class Holothuroidea?
have modified podia that form circumoral tentacles