VQ-respiratory system

What does your body need more of when you are running?

• a. oxygen

• b. water

Where does oxygen enter your body?

• a. nostrils

• b. ears

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What is the function of the tiny hairs in your nostrils?

• A. They clean your lungs
  

• B. They obstruct dust particles

What is another name for the windpipe?

• a. trachea

• b. bronchi

What sticky substance inside the bronchi helps trap germs?

• a. mucus

• b. blood

Where does the exchange of oxygen and carbon dioxide happen?

• a. alveoli

• b. trachea

What muscle helps in breathing by contracting and expanding?

• A. Diaphragm
  

• B. Liver