Echinoderm Characteristics
Meaning of echinoderms
What is "spiny skinned"
Symmetry arthropods exhibit
What is bilateral symmetry?
What is the Water Vascular System?
A network of water filled canals.
This arthropod has ten legs and is known for its tasty tail.
What is a lobster?
Echinoderm that can swim
What are feather stars (Class Crinoidea)
Symmetry do echinoderms exhibit
What is pentaradial/pentamerous symmetry ?
Arthropods grow by shedding their exoskeleton in this process.
What is molting (ecdysis)?
Muscular extensions of the water filled canals with suckers on them.
What are the tube feet?
These small shrimp-like crustaceans are a key part of the ocean food chain.
What are krill?
Outer hard cuticle which covers and protects arthropods body
What is a carapace?
This structure helps starfish grip surfaces and move.
What are tube feet?
Body Segments of arthropods
head, thorax (cephalothorax), and abdomen
Aristotle's lanterns, mouth feeding structure is found in what class (species)
What is Class Echinoidea, sand dollars, sea urchins, sea biscuits
Arthropods have this type of skeleton made of chitin.
What is an exoskeleton?
Name of arthropod's claws
What is a cheliped?
A skeleton under the external surface of an animal
What is an endoskeleton
Marine arthropods like crabs and lobsters belong to this subphylum.
What is subphylum Crustacea?
Sea cucumbers use this defense mechanism, ejecting internal organs.
What is evisceration?
This crustacean attaches to hard surfaces and has feathery legs (cirri) for filter feeding.
What are barnacles?
2 Types of arthropods (think mouth structures)
Chelicerates (no mouth chewing) and Mandibulates (mandibles to chew)
A porous plate on the aboral surface that connects to the water vascular system
What is a madreporite?
Arthropods have this kind of circulatory system.
What is an open circulatory system?
Water movement in Class Asteroidea
H2O enters madreporite to stone canal to ring canal to radial canals
This armored arthropod has remained relatively unchanged for 450 million years.
What is the horseshoe crab (only living member of Class Merostomata)
How do some species of echinoderms reproduce asexually?
By deliberately splitting their body in half or breaking off an arm. Each part becomes a whole new animal.