Respiratory System Structures and Functions

Main organ of the respiratory system.

• lungs
• trachea
• larynx
• bronchioles

Smaller branches of the bronchi inside the lungs.

• alveoli
• bronchioles
• larynx
• mouth

Main muscle that controls breathing by changing pressure in the chest cavity when it contracts or relaxes.

• mouth
• pharynx
• diaphragm
• alveoli

Common passageway of your nasal cavity and your mouth.

• pharynx
• larynx
• bronchi
• trachea

Flap that closes over the trachea when swallowing to keep food from “going down the wrong pipe”; remains open when breathing.

• alveoli
• epiglottis
• larynx
• pharynx

Windpipe; tube leading into the chest cavity.

• pharynx
• trachea
• bronchi
• diaphragm

“Grape-like”, Tiny, thin walled sacs where oxygen and carbon dioxide are exchanged.

• alveoli
• epiglottis
• nasal cavity
• bronchioles

Branches of the trachea that lead to each lung.

• bronchi
• pharynx
• bronchioles
• alveoli

Place where air enters the body; warms, moistens, and filters incoming air.

• lungs
• mouth
• bronchioles
• nasal cavity/nose

What does the cilia do in the respiratory syestem ?

• The cilia carries food and air through the respiratory system. 
• The cilia is known to be part of a cell. 
• Cilia filters particles that enter the nose. 
• Cilia contains the vocal chords.