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Dem Bones

Dem Bones - Reviewed by Kidzworld on Dec 27, 2006
( Rating: 1 Star Rating)

You probably think of death when you think about skeletons. Maybe you think that skeletons are like scaffolding, holding everything in the body in place. The truth is bones are a lot more. They're alive.

You probably think of death when you think about skeletons. Or maybe you think that skeletons are like scaffolding, holding everything in the body in place, and the bones are like metal bars. True but bones are also very much alive. They aren't just some solid material like metal, they are alive with cells. Human bones have three layers. The smooth, hard outer layer is cortical bone. Beneath this layer are many layers of cancellous bone. Cancellous bone looks kinda like a sponge. Although not quite as hard as cortical bone, it's still pretty strong. The third and innermost layer is the bone marrow. Bone marrow is like a thick jelly, and its job is to produce blood cells. So, as you can see, bones aren't only alive, they're responsible for keeping you alive as much as the heart or the brain!

What Do Bones Do?

1Bones make blood cells.

1Bones are the framework for your body.

How Many Bones?

Humans are born with 300 bones, but adults only have 206 bones. So what gives? Some of the 300 original bones in a baby are made of regular bone and some are made of a material called cartilage. Cartilage is soft and flexible to start, but over the years the cartilage grows and slowly hardens into bone. Also, some bones fuse together. All of this is part of the normal growth process.

Some time between the ages of 17 and 21, this growth process ends and your bones are as big as they're going to get. And like magic, you end up with 94 fewer bones than you started with.

Bits of Bones

1More than half of the body's 206 bones are in the hands and feet.

1The skull is composed of 30 different bones.

1The smallest bone in the body is the stirrup bone inside the eardrum. It is less an inch long.

1The largest bone in the body is the femur which is the leg bone that runs from the hip to the top of the kneecap (patella.)

1Everyone's heard of the funny bone, but did you know that humerus is the real name of the long bone that runs from your elbow to your shoulder.

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haych-dot-hussain
So y dnt u jus sit next 2 some1 else...some1 who is happy nd 4get bout wat happened.....
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MysticalC
My mother would ask me why I did what I did and then I would find out a way to lie myself out of trouble but she also sometimes takes a long stick and uses it to hit me anywhere possible and I mean anywhere.My grandmother would just straight out do the second thing.
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MysticalC
Just now,I wouldn't let my cousin look at my ipad and my grandmother gangs up with my cousin and both now say I am horrible and mean and unkind.Shouldn't they understand that I should have at least some privacy and not have my cousin breathing down my neck every possible time! I now need advice real badly.
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Lilbear813
Lilbear813 posted in Style:
Yup and i wasnt trying 2 offend any body if u kno wat i mean
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aja2hip
aja2hip posted in Style:
If you mean that special someone then I guess that would be my boyfriend!
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