Actually, earthworms have no respiratory system at all, they get the oxygen and nitrogen that they need from the soil.
through skin
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.
The kidneys are the principal organ.
The earthworm has no special respiratory organs. Gaseous exchange occurs through moist skin by diifusion.
The lungs are the main organ of the respiratory system, but they are also an organ in the circulatory system.
The respiratory system.
The respiratory system is the organ system that moves air into and out of your body.
The main organ in the respiratory system the lungs.
respiratory system
respiratory system
The lungs.
Respiratory system