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Clitellum
An external feature of earthworms, used for reproduction by secreting mucus.

Crop - 3
Part of the digestive system that stores food temporarily for digestion.

Aortic Arches (hearts)
Five pairs in earthworms, acting as hearts in the closed circulatory system.
Nephridia
Components of the excretory system in earthworms, filtering waste from the blood.
Respiratory System
Earthworms lack specialized organs; gas exchange occurs through the skin.

Gizzard - 4
Grinds food, part of digestive system

pharynx
uses muscles to suck food in

Seminal receptacles - 7
Receives sperm - reproductive system

Seminal vesicles - 6
Stores and creates sperm