Starfish dissection
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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.

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STARFISH DISSECTION

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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 meaning

KINGDOM _____________

PHYLUM _____________________________

CLASS _______________________________

ANIMALIA

ECHINODERMATA “spiny skin”

ASTEROIDEA “star-like”


SPINES

PEDICELLARIA

SKIN GILLS

Image by Riedell


SPINY SKIN

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

SPINES for protection connect to

ENDOSKELETON inside underneath skin


OSSICLESCalcium carbonate plates

form endoskeleton inside

http://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

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

EXCHANGE GASES and

EXCRETE NITROGEN WASTE


TUBE FEET surfaces

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

Can exchange gases and excrete nitrogen waste


EYESPOTS

Sense light/dark


ORAL VIEW

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


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


Madreporite

Opening to water vascular system

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


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 FEET

Used for feeding & locomotion

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

Can exchange gases and excrete nitrogen waste


CUT TRIVIUM


DIGESTIVE GLAND

Makes BILE

ABSORBS NUTRIENTS


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


2 part STOMACH


DIGESTIVE SYSTEM

ANUS

DIGESTIVE

GLANDS

DIGESTIVE

GLANDS

DIGESTIVE

GLANDS

MOUTH


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

CARDIAC stomach connects to mouth(extruded during feeding)

PYLORIC stomach connects to digestive glands and ANUS


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


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

AMBULACRAL RIDGE covered by OSSICLES

contains RADIAL NERVE (nervous)

RADIAL CANAL (water vascular system)


WATER VASCULAR SYSTEM

BIODIDAC


AMBULACRAL RIDGE

AMPULLAE (tops of tube feet)


OSSICLESCalcium carbonate plates

form endoskeleton inside

http://ebiomedia.com/prod/BOechinoderms.html


GONADS


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


NERVOUS SYSTEM

NERVE 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 a

TROCHOPHORE LARVA

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


SEXUAL REPRODUCTION

FERTILIZATION

EXTERNAL

INDIRECT

DEVELOPMENT

LARVA

BIPINNARIA

Has BILATERAL SYMMETRYand wings to swim


ASEXUAL REPRODUCTION

Ability to self amputate

AUTOTOMY

Ability to regrow lost parts

REGENERATION


Starfish

dissection

By: Carol Parker

Thanks to: Denise Roper and Lynn Fink


Dried Specimens


Common StarfishClass Asteroidea

Aboral

view


trivium

bivium


anterior arm

central disc

arms


Madreporite


bivium

madreporite

stonecanal

trivium


madreporite

peristome

stone canal


radialcanal

circular canal

peristome


Arms

Oral view

Ambulacral

Grooves

Mouth


Spines

Tube

feet


Preserved Specimens


madreporite

anterior

arm


bivium

central

disk


ambulacral

grooves

mouth


mouth

tube feet

peristome


pyloric stomach

intestine

anus

intestinal caecum


pyloric stomach

pyloric caecum

pyloric duct


Pyloric stomach

Pyloric caecum


Pyloric

stomach


Pyloric

caecae


Gonads


Cardiac

stomach


cardiac stomach

peristome


Cardiac stomach


circular canal

ampulla

radial canal

polian vesicle


ampulla

tube feet

radial canal


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