How does the hand work?

Hi everyone! Welcome to another post! Today we learned about our hand, how it works and the things that are inside of them. After learning about them we created our own hands with some strings and paper. Finally, we then had to create a blog post explaining how the hand works. Please enjoy reading my post and I hope you learn something!

What are the parts that help the hand move?

• Bones:

Bones provide structure and support. There are five bones in the palm which lead into the fingers. The fingers have 3 bones except for the thumb which has 2 bones.

• Joints: 

The joints are where two bones meet, joints allows movement between the bones.

• Ligaments:

Ligaments are a connective tissue that attaches bones together.

• Muscles & Tendons: 

There are no muscles in our fingers but there are muscles in our palm and forearm, this is where the tendons come in. We need tendons because they attach the bone into the muscles. Tendons run from the tip of our fingers down to our muscles, the muscles move our hands by contracting and relaxing.

So therefore when we contract our muscles it pulls down on the tendon to make our finger curl down.

Example:

This is an example of a hand but made from string, paper and straws. The blue string is the tendons which connect to the muscles, the straws are the bones in our hand, 3 in each finger and 2 for the thumb. The palm has five main bones that connect to the fingers.