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PHYLUM ANNELIDA SEGMENTED WORMS Don’t try this at home! many bristles CHARACTERISTICS: • SEGMENTED BODY • BILATERAL SYMMETRY • MANY WELL DEVELOPED SYSTEMS RAPTORIAL FEEDERS: ex: CLAMWORM & BLOODWORM Blood worms have 4 jaws RAPTORIAL FEEDERS: HAVE HOOK-LIKE JAWS HELD INSIDE THE BODY WHICH STRIKE OUT TO GRAB PREY. FOOD IS THEN PULLED BACK INSIDE OF THE BODY & DIGESTED. CLAM WORM - RAPTORIAL FEEDER SEPTA walls separate segments PARAPODIA act as gills (absorb oxygen) & used to crawl & dig TENTACLES sense of touch, taste/smell PHARYNX pushed out to feed JAWS grasp prey PARAPODIA CLAMWORM BLOODWORM BRISTLE WORM FIRE WORM – immature FIRE WORM – mature SUSPENSION FEEDERS • FILTER FEEDERS • FOOD IS TRAPPED BY FEATHERY TENTACLES & BROUGHT TO THE MOUTH • LIVE IN TUBES THEY CREATE (SAND, CALCIUM) • EXAMPLES: FAN WORM FEATHER DUSTER WORM SUSPENSION FEEDERS TENTACLES MOUTH TUBE FEATHER DUSTER WORM FEATHER DUSTER WORM TUBE AFTER BEFORE Yellow Feather Duster Worm BANDED FEATHER DUSTERS RED TUBE WORMS FEATHER DUSTER SLIME FEATHER DUSTER CHRISTMAS TREE WORMS SPIRAL TUBE WORMS CALCIUM WORM TUBES SPIRAL WORM SHELL DEPOSIT FEEDERS • USE STICKY TENTACLES TO FIND FOOD ON THE SURFACE OF SEDIMENT • LIVE IN BURROWS IN SAND/MUD GILLS SPAGHETTI WORM SPAGHETTI WORM CROSS-SECTION MUSCLES INTESTINE DORSAL BLOOD VESSEL CLOSED SYSTEM! REPRODUCTIVE CELLS PARAPODIA SETA / CHAETES SPINES NEPHRIDIA VENTRAL NERVE CORD VENTRAL BLOOD VESSEL FUNCTIONS OF ORGANS/SYSTEMS INTESTINE – ABSORB NUTRIENTS MUSCLES – CAUSE MOVEMENT BLOOD VESSELS – CARRY BLOOD PARAPODIA – CRAWLING/DIGGING NERVE CORD – CARRIES MESSAGES TO/FROM THE BRAIN NEPHRIDIA– EXCRETE URINE SETA/SPINES – HELP MOVE INCREASE TRACTION
