Hands

 How your hands work and what parts are there:

Altogether there are 27 bones in your hand.

There are 5 bones in your palm, 8 bones in your wrist and 14 bones for your fingers

A tendon is a type of stringy and connective tissue which attaches your muscle to the forearm bone allowing your phalanges ( bones in you fingers) to move up and down. They also attache muscles to the structure like the eyeball.   

The muscles in your hand are thumb Muscles, Palmar Muscles and Little Finger Muscles. The main muscle in your hand that moves your phalanges is called Flexor Digitorum Profundus. This muscle is in the forearm which flexes the fingers to move, contacting and relaxing the tendons. 

A short band of tough and flexible fibrous connective tissue which connects two bones or cartilages or holds together a joint. Ligaments also help structure of movement for your fingers so they aren't jelly.