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Earthworm Anatomy

TermDefinition
mouth cavity entrance to the digestive tract
pharynx powerful muscle that pulls food into the mouth
espohagus connects the pharynx and the crop
crop stores food until it is ready to be digested
gizzard powerful muscles that grinds food
intestines site where digestion and absorption takes place
anus where waste exits the worm
dorsal blood vessel carries blood along the back of the worm
ventral blood vessel carries blood along the belly of the worm
5 aortic arches pumps the blood
brain controls the inputs and outputs of the worm
ventral nerve cord carries the messages to and from the brain
seminal vesicles makes and holds the earthworms sperm until it is ready to be released
seminal receptacles hold the donor's sperm
openings to the ovaries where the eggs come out
genital setae specialize setae that holds the earthworms together during reproduction
prostomium flap that covers the mouth
setae bristle-like structures that help the worm to move
sperm grooves external tracts where the sperm moves during reproduction
annelid phylum meaning "little rings"
clitellum part of the worm that creates the mucus used in reproduction to make the cocoons
hermaphrodite having both male and female sex cells (eggs and sperm)
esophagus the organ around which the aortic arches wrap
open circulatory system type of circulatory system where the blood stays inside of the blood vessels
supraesophageal ganglia another name for the "brain"
Created by: shelly73
 

 



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