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![]() edHelper.com The Human Body |
Your Amazing Body |
| edHelper's suggested reading level: | grades 5 to 8 | |
| Flesch-Kincaid grade level: | 4.91 |
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Your Amazing Body
By Cindy Grigg |
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1 You might be amazed at some of your own measurements. Did you know that your heart is only about the same size as your fist? When you were first born, your heart had a mass of about 19 grams (about seven-tenths of an ounce) and beat nearly 120 times per minute. As an adult, your heart will probably have a mass of 255g (nine ounces) to 312 g (eleven ounces) and beat about 70 times per minute.