Nose (external nose and nasal cavity), paranasal sinuses, and pharynx
lower respiratory system/tract
Larynx, trachea, bronchial tree, alveoli, lungs and pleurae.
functional divisions of the respiratory system
the actual area/site of gas exchange, which includes the respiratory bronchioles, alveolar ducts, alveoli, and capillaries.
refers to the all of the respiratory structures that allow air to reach the gas-exchange sites; these are the structures ranging from the nose to the respiratory bronchioles. This zone also cleanses, humidifies, and warms the air.