The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide. The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body.
Your heart is sort of like a pump, or two pumps in one. The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body.
The water inside the jar represents the blood, pumped by the heart. Explanation: The water inside the jar represents the blood. In the heat pump model, a jar is filled with water that is the heart pumping the blood to other parts of the body.
Hold two fingers gently against your wrist or the side of your neck, where you can feel (and maybe even see) a blood vessel. (You have to be very still and quiet. If you have trouble, ask your teacher for help.) Then, as your teacher times 30 seconds, count how many times your heart beats.
The heart weighs between 7 and 15 ounces (200 to 425 grams) and is a little larger than the size of your fist. By the end of a long life, a person’s heart may have beat (expanded and contracted) more than 3.5 billion times.
Tongue. Tongue meat is rich in calories and fatty acids, as well as zinc, iron, choline, and vitamin B12. This meat is considered especially beneficial for those recovering from illness or for women who are pregnant.
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