PHYLUM ANNELIDA SEGMENTED WORMS

Don’t try this at home!

many bristles SEGMENTED BODY MANY WELL DEVELOPED SYSTEMS BILATERAL SYMMETRY CHARACTERISTICS:

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 FILTERFEEDERS 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

BEFORE AFTER

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

CROSS-SECTION MUSCLES DORSAL BLOOD VESSEL CLOSED SYSTEM! REPRODUCTIVE CELLS INTESTINE VENTRAL NERVE CORD NEPHRIDIA SETA / CHAETES VENTRAL BLOOD VESSEL PARAPODIA SPINES

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