Respiratory System Overview

The path of air from the nose to the lungs.

Includes the Nostrils, Nasal Cavities, Pharynx, Epiglottis and the Larynx.

Consists of the Trachea, Bronchi, Bronchioles and the Lungs.

Exchange of air between the external environment and the alveoli.

Particles of large size Dust, pollen, smoke, which are trapped in the mucous that lines the nasal cavities

Cells lining the trachea that secrete mucus, which are the the sticky mucous and the cilia helps propel it back up the trachea

These receptors are abundant in the bronchi and mediate bronchoconstriction

Contraction of the diaphragm and intercostal muscles stimulated by phrenic nerves, to increase the size of the alveoli

Lungs return to their initial size due to high levels of elastin

Return to initial size after distention, using high levels of elastin.