The human hand essays

The human hand essays Without the hand, it would be almost impossible for the world to be the way it is today. The importance of this body part is extremely essential for humans to survive. The hand helps to perform in everyday tasks such as opening a Coke bottle or writing a research paper. This is probably one of the most important body parts of the human body. Without the hand, humans would be unable to make and use the tools which led them into The human hand is made up of 27 different bones. Eight carpal bones which make up the wrist. Five metacarpal bones that make up the palm. And fourteen phalangees which make up the fingers. The Carpal bones are arranged in two rows of four. The row nearest the forearm is called the proximal row. The row nearest the palm is called the distal row. The carpal bones are small, cube-shaped, and each has six sides except for the pisiform, which has five sides. The metacarpal bones are the five long bones of the palm. They are named the first, second, third, fourth and fifth Metacarpal, the first being the one leading to the thumb. The Phalangees are the bones of the fingers. Each finger contains There are twelve different muscles of the hand which are divided into three different groups. The muscles of the thumb make up the Thenar Eminence. The muscles that form the other fingers (also know as baby fingers) are called the Hypothenar Eminence. Twenty muscles from the forearm also control the hands movements. These are the flexors, extensors, supinators, pronators. The flexors help flex the wrist and fingers. The extensors help to extend the wrist and fingers. The supinators assist in turning the palm upward. The pronators help turn the palm downward. There are many different disease that can effect the hand. Some of these include carpal tunnel syndrome, ganglion cysts, dupuytren's contracture, and de quervain's. C ...