phylum annelida segmented worms · • segmented body • many well ... worms . feather duster...
TRANSCRIPT
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
Jaws protrude out
of the body!
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.
Bloodworms
have 4 jaws!
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
2 JAWS
grasp prey
50 sec
PARAPODIA
CLAMWORM
BLOODWORM
BOBBIT
WORM
2 min
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
SPIRAL
TUBE
WORMS
FEATHER
DUSTER
WORMS
CHRISTMAS
TREE
WORMS
WORM
TUBES of
calcium
DEPOSIT FEEDERS
• USE STICKY TENTACLES
TO FIND FOOD ON THE
SURFACE OF SEDIMENT
• LIVE IN BURROWS
IN SAND/MUD
GILLS
25 sec
SPAGHETTI WORM
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