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