PHYLUM ANNELIDA SEGMENTED WORMS. Don’t try this at home!
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Transcript of PHYLUM ANNELIDA SEGMENTED WORMS. Don’t try this at home!
PHYLUM ANNELIDASEGMENTED 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• 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
SPAGHETTI WORM
CROSS-SECTION
MUSCLES
DORSAL BLOOD VESSEL CLOSED SYSTEM!
REPRODUCTIVE CELLSINTESTINE
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/DIGGINGNERVE CORD – CARRIES MESSAGES
TO/FROM THE BRAIN
NEPHRIDIA– EXCRETE URINESETA/SPINES – HELP MOVE
INCREASE TRACTION