Your Lungs

Questions

1. Main idea What is this passage mostly about?

   what your lungs do and how to keep them healthy what your skin does and how to keep it healthy what your heart does and how to keep it healthy what your teeth does and how to keep it healthy
2. Details What is the job of your lungs?

   to cut and grind food so you can swallow it to take in oxygen and get rid of carbon dioxide to control everything your body does to protect your body from germs, heat and cold
3. Vocabulary What does "oxygen" mean?

   a thin fiber that carries messages between the brain and the body the hard, shiny outer layer of a tooth the parts of food the body uses to grow and stay healthy a gas in the air that the body needs to live
4. Cause and effect According to the passage, why does this job matter?

   Without a skeleton, your body would have no shape and your brain and heart would have no protection. Every cell in your body needs oxygen to make energy. As sweat dries, it carries heat away and cools you down. Your body needs one control center to make all its parts work together.
5. Details Which fact is in the passage?

   A child's heart beats about 70 to 100 times a minute when resting, and faster when running. Your two lungs are not the same size: the left one is a little smaller to make room for your heart. Tooth enamel is the hardest substance in the human body. In an adult, the small intestine is about 6 meters long, folded up inside the belly.
6. Inference Which habit would the author most likely recommend?

   Calcium from foods like milk, yogurt and leafy greens helps bones grow strong. Washing and sunscreen help protect your skin. Clean air and exercise keep the lungs healthy; smoke harms them. Brushing twice a day removes the sugar and germs that cause cavities.

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