Overview of Respiratory System

The major function of the respiratory system is:

• Digestion of food

• Circulation of blood

• Exchange of gases

• Production of hormones

Name a key structure of the respiratory system responsible for filtering and humidifying the air.

• Lungs

• Trachea

• Nasal cavity

• Bronchi

The role of the pharynx in the respiratory system is to:

• filter air before it enters the lungs

• moisten and warm the air

• serve as a passageway for air between the nose and trachea

• exchange gases with the blood

The function of the larynx in the respiratory system is to:

• produce sound and protect the trachea

• filter air entering the lungs

• exchange oxygen and carbon dioxide

• humidify and warm the air

The function of the trachea in the respiratory system is to:

• filter and humidify the air we breathe

• exchange oxygen and carbon dioxide

• transport air to and from the lungs

• protect the lungs from infection

The function of the diaphragm in the respiratory system is to:

• filter air entering the lungs

• exchange oxygen and carbon dioxide

• pump blood throughout the body

• contract and relax to aid in breathing

Fill in the blank: The key structures of the respiratory system include the nose, pharynx, larynx, trachea, lungs, and ________.

• Bronchi

• Esophagus

• Diaphragm

• Heart

Air enters the nose through ______ and is warmed/moistened as it passes through the nasal cavity.

• nostrils

• mouth

• ears

• eyes

The epiglottis is a piece of cartilage that blocks the larynx when we swallow food. True or False?

• True

• False

How many lobes does the right lung have?

• 2

• 3

• 4

• 5