Respiratory System LW

The purpose of the lungs is mainly to

• allow oxygen into the body

• remove carbon dioxide

• remove water vapour

The normal oxygen content of inhaled air is approximately

• 0.04%

• 21%

• 79%

• 100%

From the trachea the airway splits into

• brachycardia

• breathers

• bronchioles

• brioche

Specialist cells in the bronchioles have structures on them called

• alveoli

• cilia

• dermacytes

• erythrocytes

Why do you need mucous membranes in the bronchioles?

• to help the food go down smoothly

• to stop the air irritating them

• to help air pass through

• to trap and remove foreign particles

The diaphragm is in letter ....

• a

• b

• c

• d

• e

When you breathe, your lungs take in ___ and remove ___. 

• air/oxygen
• oxygen/carbon dioxide 
• carbon dioxide/waste 
• waste/air 

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi
• lungs
• oxygen
• alveoli

Breathing out; exhalation of breath.

• Inspiration

• Expiration

The drawing in of breath; inhalation.

• Inspiration

• Expiration