echinoderms. spiny skin spiny skin radial symmetry radial symmetry water vascular system water...
TRANSCRIPT
EchinodermsEchinoderms
Spiny skinSpiny skin Radial symmetryRadial symmetry Water vascular Water vascular
systemsystem
Form and FunctionForm and Function
Water vascular- Water vascular- respiration, respiration, circulation, circulation, movement.movement.
Madreporite- Madreporite- connects the ring connects the ring canal to the canal to the outside.outside.
Tube feet- movement.Tube feet- movement. Feeding- sea stars push out Feeding- sea stars push out
stomach and enzymes break down stomach and enzymes break down shells.shells.
Excretion- cellular through tube Excretion- cellular through tube feet(ammonia), solid through anus.feet(ammonia), solid through anus.
External fert.External fert.
Groups of Groups of EchinodermsEchinoderms
Sea Urchins and Sand Sea Urchins and Sand DollarsDollars
Large solid platesLarge solid plates Most eat algaeMost eat algae
Brittle StarsBrittle Stars
Found on coral Found on coral reefsreefs
Can shed an arm Can shed an arm to escapeto escape
Filter feeders Filter feeders
Sea CucumbersSea Cucumbers
“ “ Moving pickles”Moving pickles” Detritus feedersDetritus feeders
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Sea StarsSea Stars
Most are Most are carnivorescarnivores
Eat bivalvesEat bivalves Can repair Can repair
themselvesthemselves
Sea Lilies and Feather Sea Lilies and Feather StarsStars
Filter feedersFilter feeders Live in the tropicsLive in the tropics
Feather Star (Note the Feather Star (Note the depth)depth)