Download - Echinoderms – Spiny Skin
Echinoderms Are:
• Starfish
• Sea Lilies
• Feather Stars
• Basket Stars
• Sea Urchins
• Sea Cucumbers
• Sand Dollars
There are 5 characteristics:
• Radial Symmetry
• Spiny skin
• Internal skeleton
• Water vascular system
• Tube feet
• The internal skeleton of an echinoderm is made of calcium carbonate bony plates that are bumpy or spiny for protection.
• An echinoderm’s water vascular system is a system of canals that carry food and oxygen and remove wastes.
• The water vasuclar system also helps an echinoderm move.
Tube feet movie Tube feet movie 2
• Echinoderms have tube feet used for moving and getting food.
5 Class of Echinoderms
• Crinoidea- Sea Lillies
• Ophiuroidea- Brittle Stars
• Echinoidea- Sea Urchins and Sandollars
• Holothuroidea- Sea Cucumbers
• Asteriodea- Starfish
Crinoidea (kri-NOID-ee-uh)
• sea lilies and feather stars
• sessile and mobile
• 5 arms extend and branch
• tube feet filter feed and respire
• mouth faces up
Echinoidea (EK-uh-NOID-ee-uh)
• sea urchins and sand dollars
• endoskeleton called test
• sea urchins eat by scraping algae with jaw-like Aristotle lantern
• Sand Dollars live along seacoasts
• short spines used for locomotion
sand dollars
Holothuroidea (HOH-loh-thuh-ROID-ee-uh)
• Sea Cucumbers– soft body
• Armless, they burrow
• Tube feet around mouth
Sea cucumbers movie
Sea Cucumber movie 2
• A starfish is able to re-grow it’s arms.
• A starfish uses its tube feet to move and to open it’s food (bivalves).
Kingdom of Animals Invertebrates
• Porifera – Sponges• Flatworms – Turbellaria, Trematoda,,Cestoda• Roundworms- Nematoda• Rotifers• Mollusks – Gastropoda, Bivalves, Cephalopods• Annelida- Oligochaeta, Polychaeta, Hirudinea• Cnidarians- Hydrozoa, Scyphozoa, Anthozoa• Arthropods – Crustacians, Arachnids, Myriapods and
Insects• Echinoderms – Crinoidea, Ophiuroidea, Echinoidea,
Holothuroidea, Asteriodea.