My Amazing Body Series 02

What are the tiny sacs in the lungs called where oxygen enters the blood?

• a) Alveoli
• b) Bronchioles
• c) Trachea
• d) Diaphragm

Which muscle helps pull air into and push it out of the body?

• a) Ribs
• b) Diaphragm
• c) Heart
• d) Lungs

What does your nose help you to do?

• a) Taste only
• b) Breathe only
• c) Smell and taste
• d) See

What does the nose do to the air we breathe?

• a) Cools and dries it
• b) Warms and humidifies it
• c) Filters out light
• d) Adds carbon dioxide

What happens to your breathing rate when you exercise?

• a) Increases
• b) Decreases
• c) Stays the same
• d) Stops

Why does your body need oxygen?

• a) To release energy from food
• b) To cool down the body
• c) To store waste
• d) To fight germs

What gas is removed from the body by the respiratory system?

• a) Carbon dioxide
• b) Oxygen
• c) Nitrogen
• d) Hydrogen

Which part of the respiratory system connects the windpipe to the lungs?

• a) Nose
• b) Alveoli
• c) Diaphragm
• d) Bronchi

What is the role of cilia in the respiratory system?

• a) To exchange oxygen
• b) To move mucus back and forth
• c) To contract the diaphragm
• d) To warm the air

Where does the exchange of oxygen and carbon dioxide take place?

• a) Trachea
• b) Bronchi
• c) Alveoli
• d) Diaphragm