Hands

How does your hand works and what are the parts?

Bones:

There are 27 bones in your hand:

1. 8 bones in your wrist

2. 5 bones in your palms

3. 13 bones for your fingers and thumb(3 in each finger) 

Tendons

What is a tendon? A tendon is a band of connective tissue that connects the muscles of the forearm bone to the phalanges which let your fingers move up and down.  This means that there are long strips of tendons that start at the tip of your finger and go all the way down to the muscle in your forearm. So your fingers only move when your finger muscle tenses.

Muscles

The muscles in your hand are Thumb Muscles, Palmar Muscles, and Little Finger Muscles.  But the main muscles that you use to move your fingers are the ones in your forearm that are called Flexor Digitorum Profundus.  This muscle is what they mainly use to control the tendons.  It does this by contracting and relaxing.  That is what makes your fingers move.

Ligaments 

The Ligements in your hand make sure that your hands are moving the right way.  Like your fingers, it can only move back and forth.  It cannot move side to side, that is what our ligaments are for.  Otherwise, our fingers will be moving like jelly.