Earthworms do not have respiratory systems. They exchange oxygen through their skin.
The nasal cavity, the mouth, the throat, the epiglottis, the trachea, the lungs, the bronchi and bronchioles, the alveoli or air sacs, the diaphragm, and the Eustachian tubes. The heart can also be...
The components of the respiratory system are the nose, pharynx, larynx, trachea, bronchi and lungs.
mouth trachea lungs alveoli
The lungs are the main organs of the respiratory system.
treatment of lower respiratory tract infection