The Respiratory System

By: Raquel C, Lauren G, Emily E, Kelly P

What is the Respiratory System?

The Respiratory System functions to move oxygen from the outside environments into the body. It also removes carbon dioxide and water from the body.

Respiration is also refered to cellular respiration because of chemical reactions in the cell.


Air travels from the outside to the lungs, it passes through these organs:

Nose: Air enters the body through the nostrils. The lining of the nose is coated with cilia and mucus, which trap particles and warm and moisten the air.

Pharynx: Air moves from the nose downward into the throat, or pharynx. Part of the pharynx is also a passageway for food.

Trachea: Leads from the pharynx toward the lungs. The walls of the trachea are made up of rings of cartilage which protect the trachea and keep it from collapsing.

Bronchus: Air moves from the trachea into the right and left bronchi. One bronchus leads to each lung. Part of each bronchus is outside the lung and part is inside.

The Muscle used to breath

Diaphragm: a dome-shaped muscle that plays in an important role in breathing