Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/5

Click to flip

5 Cards in this Set

  • Front
  • Back
Phylum Echinodermata
-Marine, spiny-skinned animals
-Most adults are radially symmetric
-All have endoskeleton
-Thin epiderms
-Body 5-parted or in multiples of 5
Class Asteroidea
Starfish
-Carnivores
-Tube feet used for locomotion and exerting pressure on prey
-Mouth is ventral, central disc is large, arms are usually stout
Class Ophiuroidea
Brittle Stars
-Small central disc, arms are independent of disc
-Tube feet used in gatherine food
Class Echinoidea
Sea Urchins and Sand Dollars
-Tube feet for locomotion
-Urchins have prominent spines and are herbivores
-Dollars are flattened and are deposit feeders
Class Holothuroidea
Sea Cucumbers
-Burrow in sediment and ingest it
-Detritivores
-Skeleton is reduced to small spicules contained in leathery empidermis