Functions of the respiratory system

What is the function of the nasal cavity in the respiratory system?

• To filter and humidify the air we breathe

• To pump blood throughout the body

• To digest food

• To transmit nerve signals

The pharynx is commonly called the _______.

• throat

• nose

• ear

• tongue

Which part of the respiratory system is known as the voice box?

The trachea is approximately how long?

• 10-12 cm

• 15-20 cm

• 5-7 cm

• 20-25 cm

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

• Prevent food from entering the windpipe

• Aid in the digestion of food

• Filter out dust and particles from the air

• Exchange oxygen and carbon dioxide

Approximately how many alveoli are present in each lung?

• 100 million

• 300 million

• 500 million

• 700 million

The primary function of alveoli in the lungs is:

• To filter out dust and particles

• To exchange oxygen and carbon dioxide

• To pump blood throughout the body

• To produce mucus

What is the process of transferring oxygen into the blood and removing carbon dioxide called?

The role of alveoli in gaseous exchange is to:

• Transport oxygen to the bloodstream

• Facilitate the exchange of oxygen and carbon dioxide

• Store carbon dioxide

• Filter impurities from the air