Echinoderm
Study Guide
General
Adult echinoderms have ______ symmetry
The symmetry based on five parts is called ______radial symmetry
Unlike adult echinoderms, planktonic larvae have______
Echinoderms have Endoskeletons or Exoskeleton?
What is the water vascular system?
The tube feet and digestive system are powered by ______
The water vascular system connects to the outside through the ______
Sea Stars
______are spines that have been modified into minute, pincer-like organs and help keep the surface of the sea star clean.
A sea star’s endoskeleton is made of interconnected ______ plates.
In sea stars hundreds of tube feet protrude from the oral surface along radiating channels on each arm are called ______.
Sea stars use their ______to move and drag themselves along the bottom.
Most sea stars are ______preying upon bivalves, snails, and barnacles.
Brittle Stars
Brittle stars typically have ______(number) of arms
What do brittle stars lack that other echinoderms have?
The Gonads and internal organs are located in the ______, and don’t extend into the arms.
Brittle stars eat ______and ______from the bottom
Most brittle stars are ______feeders.
Brittle stars use their ______to pass food particles into their mouth.
Sea Urchins and Sand dollars
In sea urchins the endoskeleton forms a round rigid ______.
Locomotion in sea urchins is achieved by the movable ______and ______.
In sea urchins the intricate system of jaws and muscles is called______
The five rows of______with their tube feet extend along the outer surface of the sphere on the sea urchin test
______are adapted to live in soft bottoms by having flattened bodies and
Sand dollars are ______(how they eat: what they eat) that use their tube feet to pick up organic particles
Sea Cucumbers
What is a sea cucumber's primary defense mechanism?
Many sea cucumbers are ______and feed on ______.
How many rows of tube feet do most sea cucumbers possess?
Sea cucumbers have modified tube feet around the mouth called ______that are used to pick up organic matter.
The endoskeleton of sea cucumbers consists of microscopic ______scattered throughout the skin.
Crinoids
Crinoids are ______feeders.
Crinoids are represented by close to 600 species of ______and ______.
In crinoids, the mouths and ambulacral grooves are directed in an ______fashion.
The only echinoderms capable of short distant swimming are the ______
Nervous systems and reproduction
The ability to grow lost or damaged body parts is called?
The nervous system coordinates movements of ______and ______in the absence of a brain.
Gametes do not survive long in water so in many species individuals spawn all at once to enhance ______
Echinoderms lack a ______in their nervous system.
Planktonic ______are bilaterally symmetrical in echinoderms.