4.PCH.1

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What is the main organ involved in the respiratory system?

What element do our lungs distribute to the rest of our body?

Which of the following is the main function of the respiratory system?

What is one of the best ways to keep your body functioning well?

How can you protect your skin from the damage of UV rays?

Which of the following is not a part of the respiratory system?

Which of the following causes damage to your lungs?

Which part of our body requires oxygen?