STARFISH DISSECTION

http://www.emerchandise.com/images/p/SBS/pdPASBS0005.jpg

Kidspiration by Riedell

SYMMETRY

ADULTS- Radial

LARVA- Bilateral

http://www.uic.edu/classes/bios/bios100/labs/radial.jpg

INVERTEBRATES(No backbone)

ALL INVERTEBRATES ARE PROTOSTOMES EXCEPT

ECHINODERMS

ONLY INVERTEBRATES that are DEUTEROSTOMES

STARFISH LATIN

meaningKINGDOM _____________

PHYLUM _____________________________

CLASS _______________________________

ANIMALIA

ECHINODERMATA “spiny skin”

ASTEROIDEA “star-like”

SPINES PEDICELLARIA SKIN GILLS

Image by Riedell

SPINY SKIN

SPINES for protection connect to ENDOSKELETON inside underneath skin

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

OSSICLESCalcium carbonate plates

form endoskeleton insidehttp://ebiomedia.com/prod/BOechinoderms.html

SPINES PEDICELLARIA SKIN GILLS

Image by Riedell

PEDICELLARIAE(sing. Pedicellaria)

Keep surface clear of organisms

SKIN GILLSHollow 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

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

TUBE FEET surfaces

Can exchange gases and excrete nitrogen waste http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

EYESPOTS

Sense light/dark

ORAL VIEW

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

http://ebiomedia.com/gall/skin/skin1.html

Opening to water vascular system

Madreporite

WATER VASCULAR SYSTEM

BIODIDAC

http://mbgnet.mobot.org/salt/animals/star.jpg

ORAL VIEW

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

AMBULACRAL GROOVE

TUBE FEET sit in GROOVE

TUBE FEETUsed for feeding & locomotion

Can exchange gases and excrete nitrogen waste http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish

CUT TRIVIUM

DIGESTIVE GLAND

Makes BILEABSORBS NUTRIENTS

http://www.k-state.edu/organismic/echinoderms_and_protochordates.htm

2 part STOMACH

DIGESTIVE SYSTEM

DIGESTIVEGLANDS

DIGESTIVE

GLANDS

DIGESTIVE

GLANDSMOUTH

ANUS

CARDIAC stomach connects to mouth(extruded during feeding)

PYLORIC stomach connects to digestive glands and ANUS

http://www.k-state.edu/organismic/echinoderms_and_protochordates.htm

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish/

AMBULACRAL RIDGE covered by OSSICLES contains RADIAL NERVE (nervous)

RADIAL CANAL (water vascular system)

http://wwwbio200.nsm.buffalo.edu/labs/tutor/Starfish/

WATER VASCULAR SYSTEM

BIODIDAC

AMBULACRAL RIDGE

AMPULLAE (tops of tube feet)

OSSICLESCalcium carbonate plates

form endoskeleton insidehttp://ebiomedia.com/prod/BOechinoderms.html

GONADS

http://www.k-state.edu/organismic/echinoderms_and_protochordates.htm

NERVOUS SYSTEMNERVE RING encircles mouth

RADIAL NERVES run inside AMBULACRAL RIDGE in each arm

SEPARATE SEXES

GONADS-reproductive organs

Starfish have bothSEXUAL ASEXUAL (Regeneration)

http://www.k-state.edu/organismic/echinoderms_and_protochordates.htm

DIGESTIVEGLAND

GONAD

OSSICLES

MOLLUSKS (some ANNELIDS)

Have aTROCHOPHORE LARVA

http://www.okc.cc.ok.us/biologylabs/Images/Evolimages/trochophore.JPG

LARVA

FERTILIZATION EXTERNALINDIRECT

Has BILATERAL SYMMETRYand wings to swim

BIPINNARIA

SEXUAL REPRODUCTION

DEVELOPMENT

ASEXUAL REPRODUCTION

Ability to self amputate

Ability to regrow lost parts

AUTOTOMY

REGENERATION