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Earthworm Anatomy

TermDefinition
Cuticle keeps the worm from drying out
dorsal top part
ventral bottom part
Clitellum makes mucus that dries up to form a cocoon
Prostomium covers the mouth of the worm
mouth opening at the end allowing the intake of food consisting of particles of both living and dead substances
setae bristle like structures that help the worm move
Sperm duct openings in which sperm can pass through
sperm groove sperm moves along here from sperm duct to another
Oviduct tube through which eggs pass
anus where the poop comes out
Aortic Arches surround the esophagus and function in pumping the blood throughout the body
Ventral Blood Vessel carries blood from the aortic arches to the rest of the body
Dorsal Blood Vessel Returns blood to the aortic arches and has valves to prevent backflow
Ganglion group of nerves. In the earthworm, there is a pair of ganglia in each segment and a cerebral ganglia acts like a brain
Ventral Nerve Cord connects the ganglia in each segment of its body with the cerebral ganglia. It coordinates movement
Nephridium filters wastes. Almost each segment of the worm has a pair of nephridia.
Pharynx moves food from the mouth to the esophagus
Esophagus Carries food between the pharynx and the crop
crop stores food
Created by: 00066717
 

 



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