How Does Your Hand Work - Inside Out

For the past two weeks, we have been looking at bones and muscles in our bodies but we have been recently been looking at how our hand functions. In your hand, you have 27 bones keeping it in place as well as 20 joints to help bend your hand in ways to help us with everyday activities. With the muscles in our hand, we have them in our palm and forearm but our fingers don't have any. You have two types of joints in your hand, the first one is a hinge joint which is a joint that can only move one way like how your fingers can only for forwards, the second is a ball and socket joint which is the joint that can move around in a circle. 

We made some hands of our own out of paper, reusable straws, and string. We cut the paper into a hand shape and stuck that straws to it. We cut three pieces for the fingers but two for the thumb, then we cut 5 medium-sized ones to connect the fingers to the hand. After that, we cut a small part of the straw to connect all of them together. Once we were done with the base we used 5 thin strips of string and put them through the straw.