Starfish
Brittle stars
Sea Cucumbers
Sand Dollars and Sea Urchins
Sea Lilies and Feather Stars
100
Starfish make up ______ of all the echinoderms
1/3
100
What's the difference between a starfish and a brittle star?
Brittle stars have more flexible arms and have more brittles.
100
Sea cucumbers look like..?
Warty, moving pickles.
100
What do they mostly eat?
Large quantities of algae.
100
What kind of feeders are these creaturess?
Filter Feeders! :)
200
How do starfish feed?
They excrete their stomach's and engulf their prey, while enzymes liquefy solid foods.
200
What is the scientific name for brittle stars?
Class Ophiuroidea
200
What is the scientific name for sea cucumbers?
Holothuroidea.
200
How do Sand Dollars defend themselves?
Burrowing themselves under layers of sand or mud.
200
Are these the oldest class of echinoderms or youngest?
Oldest.
300
What is the scientific name of starfish?
Asteroidea
300
What type of consumers are they?
Scavengers.
300
What kind of feeders are they?
Detritus feeders.
300
How do Sea Urchins defend themselves?
They wedge themselves in rock crevices or use their long, sharp spines.
300
Where do modern feather stars live?
On coral reefs.
400
What are tube feet?
Hollow, thin walled tubes equipped with suction cups.
400
What type of nervous system do they have?
Simple; they have no brain but nerve net and nerve ring.
400
How do Sea Cucumbers move?
They crawl by the combined action of tube feet and the muscles of the body wall.
400
What is the scientific name for Sand Dollars and Sea Urchins?
Echinoidea
400
What do sea lilies use their tube feet for?
To capture floating plankton.
500
Thoroughly describe the Water Vascular System.
A hydraulic water system which functions in locomotion, gas exchange, waste excretion, and food collection.
500
How does the circulation system work?
Gets oxygen right from the water, therefore it has water pumped through its body.
500
Nitrogen-containing cellular wastes are excreted primarily in the form of what?
Ammonia.
500
Most larvae have what kind of symmetry? Adults?
Larvae: Bilateral Adult: Radial
500
What is the scientific name for Sea lilies and Feather Stars?
Crinoidea.
M
e
n
u