How do the joints in our body work?

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The hipbone’s connected to the leg bone…

A joint is a part of our bodies that connects two or more of our bones. Special tissues (not the kind you use to blow your nose!) called ligaments, connect the bones, and our muscles hold everything together.

There are many different types of joints. Ball-and-socket joints, which make up our shoulder and hip joints, are made of a bone with a rounded end that sits inside another bone with a cup-shaped opening. This type of joint lets us swing our arms around!

Hinge joints, like our knee and elbow joints, let us bend and unbend parts of our bodies.

Pivot joints, like the one between our neck and our skull allow for a little bit of twisting. Because of this joint, we can shake our heads “no.”

Ellipsoidal joints, like the wrist joint, allow for many types of movement, but they don't pivot and they don't have the same rotating range as a ball-and-socket joint. Think of all the motions you can make with your wrist.

Some joints don’t allow for any movement. The bones that make up our skulls are a good example of this. 

by   (whyzz writer)
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