A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body, and enable mobility. Bones come in a variety of shapes and sizes and have complex internal and external structures. They are lightweight yet strong and hard and serve multiple functions.
Here's a summary of 18 facts about bones that you should know.
1. Humans are born with 300 bones in their bodies. however, when a person reaches adulthood they only have 206 bones. this occurs because many of them join together to make a single bone.
2. The only bone fully grown at birth is located in the ear. this is also where the smallest bone in the human body is the stapes bone.
3. A human bone is as strong as granite in supporting weight. a block of bone the size of a matchbox can support 9 tons, which is four times as much as concrete. the strongest bone in our body is the femur (thighbone), and it's hollow!
4. Over half the body's bones are in the hands and feet.
5. The only jointless bone in your body is the hyoid bone in your throat.
6. Humans and giraffes have the same number of bones in their necks.
7. Adult human bones account for 14% of the body's total weight.
8. Every second, our bone marrow produces two million red blood cells.
9. Over a period of about seven years, each bone in our body is slowly replaced until it is a new bone.
10. There are 26 bones in the human foot.
11. The human hand, including the wrist, contains 54 bones.
12. The femur, or thighbone, is the longest and strongest bone of the human skeleton.
13. The stapes, in the middle ear, is the smallest and lightest bone of the human skeleton.
14. Arms are among the most commonly broken bones, accounting for almost half of all adults' broken bones. The collarbone is the most commonly broken bone among children.
15. Bones stop growing in length during puberty. Bone density and strength will change over the course of life.
16. The only bone in the human body not connected to another is the hyoid, a V-shaped bone located at the base of the tongue.
17. Bones are made up of calcium, phosphorus, sodium, and other minerals, as well as the protein collagen.
18. Bones function as the skeleton of the human body, allowing body parts to move, and protect organs from impact damage. They also produce red and white blood cells.
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