STARFISH DISSECTION http www emerchandise comimagespSBSpd PASBS 0005
STARFISH DISSECTION http: //www. emerchandise. com/images/p/SBS/pd. PASBS 0005. jpg
Kidspiration by Riedell
SYMMETRY ADULTS- Radial LARVA- Bilateral http: //www. uic. edu/classes/bios 100/labs/radial. jpg
STARFISH ANIMALIA KINGDOM _______ LATIN meaning PHYLUM _______________ ECHINODERMATA “spiny skin” CLASS ASTEROIDEA “star-like” ________________
SPINY SKIN http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish SPINES for protection connect to ENDOSKELETON inside underneath skin
OSSICLES Calcium 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 GILLS Hollow skin tubes that project from skin for increased surface area connect to coelom inside Image by Riedell
Skin gills between spines http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish EXCHANGE GASES and EXCRETE NITROGEN WASTE
TUBE FEET surfaces http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish
EYESPOTS Sense light/dark
ORAL VIEW http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish
http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish
Madreporite Opening to water vascular system http: //ebiomedia. com/gall/skin 1. html
WATER VASCULAR SYSTEM BIODIDAC
http: //mbgnet. mobot. org/salt/animals/star. jpg
AMBULACRAL GROOVE TUBE FEET sit in GROOVE
TUBE FEET Used for feeding & locomotion
Dissection Steps 1. Begin cutting down the central part of ray 1. Identify Digestive Glands 2. Identify connection of digestive glands to the pyloric stomach 2. Investigate stomach 1. Find Pyloric and Cardiac Stomachs 2. Find where Pyloric Stomach connects to digestive glands and anus 3. Find stone canal and Madroporite 1. Examine Tube Feet, Gonads, Radial & Ring Cannals, Ampullae
Begin to cut down central part of ray
DIGESTIVE GLAND Makes BILE ABSORBS NUTRIENTS
http: //www. k-state. edu/organismic/echinoderms_and_protochordates. htm
2 part STOMACH
DIGESTIVE SYSTEM ANUS 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
http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish/
http: //wwwbio 200. nsm. buffalo. edu/labs/tutor/Starfish/ AMBULACRAL RIDGE covered by OSSICLES contains RADIAL NERVE (nervous) RADIAL CANAL (water vascular system)
AMBULACRAL RIDGE AMPULLAE (tops of tube feet)
OSSICLES Calcium 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 GONADSreproductive organs Starfish have both SEXUAL ASEXUAL (Regeneration)
http: //www. k-state. edu/organismic/echinoderms_and_protochordates. htm
DIGESTIVE GLAND GONAD OSSICLES
SEXUAL REPRODUCTION FERTILIZATION EXTERNAL DEVELOPMENT INDIRECT LARVA BIPINNARIA Has BILATERAL SYMMETRY and wings to swim
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