It pushes its stomach through its mouth and surrounds the prey.
100
How to sea urchins keep predators away?
They have sacs at the end of their spikes filled with toxins.
100
What does the water vascular system NOT do?
A. Allows echinoderms to move
B. Exchanges carbon dioxide and oxygen
C. Help sense prey/predators
D. Help capture food
C. Help sense prey/predators
100
What do sea cucumbers eat? (2 things)
Detritus and plankton.
100
Where do brittle stars live?
In ocean litter or hidden under rocks.
200
How do sea stars reproduce?
The female releases eggs and the male releases sperm into the water.
200
What is constant about the sand dollar?
They have a five pointed pattern.
200
What are tube feet?
Hollow, thin tubes that end in a suction cup.
200
What happens when the sea cucumber is threatened?
They expels their organs. They grow back in a couple of weeks.
200
How does a brittle star move?
They use their flexible arms instead of tube feet.
300
How can sea stars regrow their arms?
If there is enough of the center disk left, they are able to regrow that whole arm.
300
How do sea urchins burrow into the ground?
They use their spikes.
300
How do animals move using the water vascular system?
They use pressure and move by pulling in and pushing out their tube feet.
300
Where do sea cucumbers have tube feet?
Their upper and lower surfaces.
300
How do brittle stars get eat?
They use their flexible arms to move food particles into their mouths.