starfish dissection
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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
DIGESTIVEGLANDS
DIGESTIVEGLANDS
MOUTH
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
Starfish dissection
By: Carol ParkerThanks to: Denise Roper and Lynn Fink
Dried Specimens
Common StarfishClass Asteroidea
Aboral view
bivium
trivium
arms
central disc
anterior arm
Madreporite
bivium
trivium
madreporitestone canal
madreporite
stone canalperistome
circular canal
radial canal
peristome
Oral view
Mouth
Ambulacral Grooves
Arms
Spines
Tube feet
Preserved Specimens
madreporite
anterior arm
central disk
bivium
ambulacral grooves mouth
tube feet
peristome
mouth
intestine
anus intestinal caecum
pyloric stomach
pyloric caecum
pyloric duct
pyloric stomach
Pyloric caecum
Pyloric stomach
Pyloricstomach
Pyloric caecae
Gonads
Cardiac stomach
cardiac stomach
peristome
Cardiac stomach
polian vesicleradial canal
circular canalampulla
tube feet radial canal
ampulla