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Annelida Vocabulary

Name: _______________________
Date: ________________________
Across
Thick, muscular sac that grinds food into small pieces to be absorbed by the intestine
The lobe around the mouth situated right behind the prostomium
Organisms containing a "true" fluid-filled cavity
Having three embryonic cell layers (ectoderm, mesoderm, and endoderm)
Secretion which prevents the host’s blood from clotting
Internal separations of segments
Happens at 90 days when they become old enough to mate
The five pairs of enlarged pulsating blood vessels
used for reattaching body parts or helping to speed up healing after surgery
_______ vessel that pumps blood posteriorly
Ring of nerves present around the pharynx
The lobe anterior to the mouth that helps the organism push into the soil
ventral in position, bearing a pair of ganglia and ladder-like connections in each segment
Attached organs that act as adhesion devices
Down
a stretchy sac that holds materials temporarily
lie on each side of the gut as a paired series of lobed sacs
removal of some of a patient's blood for therapeutic purposes
The external circular rings in each segment
Contains both male and female reproductive organs
______ vessel that pumps blood anteriorly
One pair in each segment collects wastes and transports them out of the body
longer, leg-like paired bristles that aid aquatic worms in swimming
Comes from the Latin word “anellus”, meaning "little ring" referring to rings or segments, along the worm’s body
Secretion which prevents host from feeling their presence
Organism in which the mouth develops first in the embryonic stage
The short stiff needlelike bristles that help anchor their segments during locomotion
Some annelids have _______ used for detecting light