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Internal parts

Earthworm Parts

TermDefinition
Aortic Arches Surround the esophagus and function in pumping 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 back flow
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.
1. Mouth, 2. Pharynx, 3. Esophagus, 4.Crop, 5. Gizzard, 6.Intestine, 7. Anus order food travels
Pharynx filters wastes. Almost each segment of the worm has a pair of nephridia.
Esophagus Carries food between the pharynx and the crop
Crop Stores Food
Gizzard Grinds Food
Intestine Digests Food
Seminal Vesicles Store sperm produced by the earthworm
Seminal Receptacles paired organs that store sperm received from another worm during copulation
Created by: Kyla Wimberly
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