through skin
Actually, earthworms have no respiratory system at all, they get the oxygen and nitrogen that they need from the soil.
The earthworm has no special respiratory organs. Gaseous exchange occurs through moist skin by diifusion.
Spiracle, or a respiratory tube
the respiratory pigment in humans is hemoglobin
1 locomotary organ of earthworm
Clitellum
The intestine.
The gizzard is the organ that helps the earthworm grind its food into tiny pieces.
The gizzard is the organ that helps the earthworm grind its food into a million pieces.
respiratory
I believe the cuticle prevents dessication of the worm (drying out).
The earthworm's circulatory system, which consists of blood vessels, helps transport oxygen from its skin to its cells. The earthworm's respiratory system, which involves breathing through its skin, allows for the exchange of oxygen and carbon dioxide at the cellular level.