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nguyendieuank120501
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Số đối của số -{-[-(-5+3)]} là
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Read the passage carefully, and then answer the questions below. JUST BREATHEZ. The movement of your blood through your heart and around your body is called circulation. The process of circulation is fast: it takes less than a minute to pump blood to every part of your body. When we breathe in, oxygen goes into your lungs. Blood from your lungs fills with oxygen and moves into the left side of your heart. The left side of your heart pumps the blood with oxygen in it out through tubes called arteries. Arteries carry blood away from your heart to your body. Your body takes the oxygen out of the blood and uses it to stay healthy and strong. We need oxygen for everything we do: moving, growing, speaking, and thinking. If we do not have oxygen, we cannot live. When your body uses the oxygen from your blood, it makes carbon dioxide. Your body doesn't need this carbon dioxide, so the blood takes it away. Other tubes, called veins, carry the blood with carbon dioxide in it back to your heart. The blood from our body goes into the right side of your heart. Then the right side of your heart pumps this blood into your lungs which remove the carbon dioxide from the blood. When you breathe out, the carbon dioxide goes back into the air. 1. From which was blood with oxygen pumped throughout the body? thim 2. What does our body need oxygen for? 3. Where does blood come back to the heart? 4. What are the functions of arteries and veins? 5. How can our body remove carbon dioxide?

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