What are the main parts and functions of our respiratory system ??

- Nostrils = are involved in air intake, i.e. they bring air to nose, where air is warmed and humidified.
- Trachea = filters the air we inhale and branches into the bronchi.
- Bronchi = the two air tubes that branch off from the trachea and carry atmospheric air directly into the lungs
- Lungs = are the main organ of respiratory system, are the site in body where oxygen is taken into and carbon dioxide is expelled out.
- Alveolus = the tiny sac like structure present in the lungs which the gaseous exchange takes place.
- Diaphragm = expands and reduces the amount of space for the lungs and forces air out