Class II

The respiratory system is made up of the trachea, the lungs, and the:
  1. Liver
  2. Diaphragm
  3. Esophagus
  4. Pancreas
When you inhale, your lungs:
  1. Inflate
  2. Turn purple
  3. Deflate
  4. Do a dance
As you breathe, this contracts and flattens to give your lungs room to fill up with air:
  1. Larynx
  2. Lung balloon
  3. Diaphragm
  4. Bronchiole
_________ is not good for your lungs.
  1. Exercising
  2. Singing
  3. Smoking
  4. Yelling
When you breathe in air, you bring oxygen into your lungs and blow out:
  1. Carbon dioxide
  2. Carbon monoxide
  3. Oxygen
  4. Hydrogen
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