STARFISH DISSECTION

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Presentation transcript:

STARFISH DISSECTION

Kidspiration by Riedell

STARFISH LATIN meaning KINGDOM ANIMALIA PHYLUM ECHINODERMATA “spiny skin” CLASS ASTEROIDEA “star-like”

Starfish (sea stars) Come in a variety of colors

... and sizes

Not all starfish have 5 arms

SYMMETRY ADULTS- Radial LARVA- Bilateral

PENTARADIAL (5 armed starfish)

SPINY SKIN SPINES for protection connect to ENDOSKELETON inside underneath skin

PEDICELLARIAE (sing. Pedicellaria) Keep surface clear of organisms

SKIN GILLS Hollow skin tubes that project from skin for increased surface area connect to coelom inside Image by Riedell

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

TUBE FEET Used for feeding & locomotion

AMBULACRAL RIDGE AMPULLAE (tops of tube feet)

SEPARATE SEXES GONADS- reproductive organs Starfish have both SEXUAL ASEXUAL (Regeneration)

ASEXUAL REPRODUCTION Ability to self amputate Ability to regrow lost parts AUTOTOMY REGENERATION

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