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About Video - Structure and Function of the Hand
Structure and Function of the Hand
The human hand is a remarkable and complex structure that plays a crucial role in our daily lives. It is a combination of bones, muscles, tendons, ligaments, and nerves that work together to perform various functions. Here's an overview of the structure and function of the hand:
Structure:
Bones: The human hand consists of 27 individual bones divided into three groups:
Carpal Bones: These are the eight small bones that make up the wrist.
Metacarpal Bones: Five metacarpal bones form the palm of the hand.
Phalanges: There are 14 phalanges in the hand, with two in the thumb and three in each of the four fingers.
Joints: The hand contains several joints that allow for a wide range of motion:
Carpometacarpal Joints: These joints connect the metacarpal bones to the carpal bones.
Metacarpophalangeal Joints: These are the joints connecting the metacarpal bones to the phalanges.
Interphalangeal Joints: These joints are found between the phalanges.
Muscles: The hand is equipped with a complex network of muscles that control its movement. These muscles are divided into two groups: extrinsic and intrinsic muscles. Extrinsic muscles originate in the forearm and control gross hand movements, while intrinsic muscles are located within the hand and are responsible for fine motor skills.
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