echinoderms. spiny skin spiny skin radial symmetry radial symmetry water vascular system water...
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EchinodermsEchinoderms
Spiny skinSpiny skin Radial symmetryRadial symmetry Water vascular Water vascular
systemsystem
Water IS their blood!Water IS their blood!
Water vascular Water vascular system- system- respiration, respiration, circulation, circulation, movement.movement.
Madreporite- Madreporite- connects the ring connects the ring canal to the canal to the outside.outside.
ReproductionReproduction
SexualSexual No visible No visible
difference difference between M and F!between M and F!
AsexualAsexual Many (NOT ALL) Many (NOT ALL)
species can species can regenerate missing regenerate missing body parts body parts
Tear 1 sea star in half Tear 1 sea star in half and with some luck and with some luck both parts of the both parts of the animal can animal can regenerate the regenerate the missing pieces.missing pieces.
Tube feet- movement, feeding, Tube feet- movement, feeding, excretion.excretion.
Feeding- sea stars push out Feeding- sea stars push out stomach and enzymes break down stomach and enzymes break down the animal.the animal. Think “milkshake”Think “milkshake”
Excretion- cellular through tube Excretion- cellular through tube feet(ammonia), solid through anus.feet(ammonia), solid through anus.
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
Sea cucumberSea cucumber
Sea StarsSea Stars
Most are Most are carnivorescarnivores
Eat bivalvesEat bivalves Can repair Can repair
themselvesthemselves
Tube feet in living sea star sea star hunting scallops and clam
s
Sea Lilies and Feather Sea Lilies and Feather StarsStars
Filter feedersFilter feeders Live in the tropicsLive in the tropics
Feather StarFeather Star