You may not realize it, but your bones are living tissue. And that tissue is always breaking down and re-growing. When the growth of new bone tissue does not keep up with the loss of old bone tissue you may develop a medical condition called osteoporosis. ...
Your bones are in different sizes(尺寸).Some are short,but some are long. Some are big, but some are tiny(极小的). The outside(外部)of your bones looks hard. Inside,they are flled with something soft(柔软的).It is called marrow(骨髓),and it keeps your bones alive(有活力的). ...
Read the following paragraph from the section Your Bones Are Alive. There are different kinds of bone cells. There is smooth bone on the outside of all bones. It is hard. There are also webs of bone strings. They are kind of like a spiders web. Those are
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please take care of your bones. Once they are broken, it will take you at least 100 days to recove from. That's nothing fun!71. How can the bones help human body?① supporting the body②) protecting the important parts3 helping to move④ making blood cells alive A. ①②③ B. ②...
Explain how the structures of long bones, short bones, irregular and sesamoid bones relate to their function. What are the functions of an irregular bone? What is rickets? What causes it and how does it affect the body? Are bones alive? Explain. ...
例2 排除法Muscles (肉) are found in most parts of your body. They work with your bones to help you move - whenever you cry or smile, eat or speak, walk or dancc, etc.Your body needs to take in oxygen from the air and give out the unwanted carbon dioxide in the body.When dust...
Why are bones alive? In fact, bones, like all other tissues in your body are alive. Because bones are the main support structure for us, they are made of a hard material that is mainly calcium. Throughout this hard substance, are blood vessels and nerves. ... Anything that is alive ...
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【题目】Your body is special-no two people in the world are alike, Although you are different fr om ereryone else, you have exactly the same b ody parts as the people around you, doing diff erent jobs that keep all o f us alive.What is inside my head?Your head houses the most ...