STARFISH DISSECTION

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Presentation transcript:

STARFISH DISSECTION

SPINY SKIN SPINES for protection connect to ENDOSKELETON inside underneath skin

OSSICLES Calcium carbonate plates form endoskeleton inside

Skin gills between spines EXCHANGE GASES and EXCRETE NITROGEN WASTE

TUBE FEET surfaces Can exchange gases and excrete nitrogen waste

EYESPOTS Sense light/dark

ORAL VIEW

Opening to water vascular system Madreporite

WATER VASCULAR SYSTEM BIODIDAC

ORAL VIEW MOUTH

AMBULACRAL GROOVE TUBE FEET sit in GROOVE

TUBE FEET Used for feeding & locomotion

TUBE FEET Used for feeding & locomotion Can exchange gases and excrete nitrogen waste

CUT TRIVIUM

DIGESTIVE GLAND Makes BILE ABSORBS NUTRIENTS

2 part STOMACH

CARDIAC stomach connects to mouth (extruded during feeding) PYLORIC stomach connects to digestive glands and ANUS

EUCOELOM OPEN CIRCULATION

ENDOSKELETON made of OSSICLES

OSSICLES Calcium carbonate plates form endoskeleton inside

WATER VASCULAR SYSTEM BIODIDAC

GONADS

AMBULACRAL RIDGE covered by OSSICLES contains RADIAL NERVE (nervous) RADIAL CANAL (water vascular system)

AMBULACRAL RIDGE AMPULLAE (tops of tube feet)

DIGESTIVE GLAND GONAD OSSICLES