Echinoderms. Spiny skin Spiny skin Radial symmetry Radial symmetry Water vascular system Water...

EchinodermsEchinoderms

Spiny skinSpiny skin Radial symmetryRadial symmetry Water vascular Water vascular

systemsystem

Water IS their blood!Water IS their blood!

Water vascular Water vascular systemsystem- 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

Sea Lilies and Feather Sea Lilies and Feather StarsStars

Filter feedersFilter feeders Live in the tropicsLive in the tropics

Feather StarFeather Star

Echinoderms. Spiny skin Spiny skin Radial symmetry Radial symmetry Water vascular system Water...

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Transcript of Echinoderms. Spiny skin Spiny skin Radial symmetry Radial symmetry Water vascular system Water...

Invertebrate Overview. Body Symmetry Radial Symmetry-body parts that repeat around center body-Cnidaria and Echinodermata Bilateral Symmetry-imaginary.

Echinoderms Echinoderms have a hard endoskeleton covered by bumpy or spiny epidermis; They have radial symmetry, a mouth, stomach, and intestines.

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Echinodermata Spiny Skinned. Echinoderms 6000 living species 20,000 extinct species all oceans, all depths Planktonic larvae - bilateral symmetry adult.