PHYLUM ANNELIDA SEGMENTED WORMS...SEGMENTED WORMS Don’t try this at home! many bristles •...
Transcript of PHYLUM ANNELIDA SEGMENTED WORMS...SEGMENTED WORMS Don’t try this at home! many bristles •...
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
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
DEPOSIT FEEDERS
• USE STICKY TENTACLES
TO FIND FOOD ON THE
SURFACE OF SEDIMENT
• LIVE IN BURROWS
IN SAND/MUD
GILLS
25 sec
CROSS-SECTION
MUSCLES
DORSAL BLOOD VESSEL
CLOSED SYSTEM!
REPRODUCTIVE
CELLS INTESTINE
VENTRAL NERVE CORD NEPHRIDIA
SETA /
CHAETES
VENTRAL BLOOD VESSEL
PARAPODIA
SPINES