How to measure the hand circumference?

How to measure the hand circumference is as follows:

1. Prepare a tape measure (soft ruler) with clear lettering to measure the circumference of the thinnest part of the wrist.

2. Wrap the wire around your wrist, mark the position of the node, and measure the length of the wire.

3. The length is as follows: 100 Yuan (15.5cm), 50 yuan (15cm), 20 yuan (14.5cm), 10 yuan (14cm), 5 yuan.

Knowledge expansion

The hand is a part of the front end of the arm of a human or other primate. It consists of five fingers and palms, and is mainly used for grasping objects. Both hands are symmetrical and mirror images of each other.

Most people have a left hand and a right hand except congenital malformation or hyperplasia. Each hand has five fingers, including the index finger, middle finger, ring finger and little finger (also called tail finger). There are only two thumbs, but there may be a sixth finger at birth.

All five fingertips have nails, and each nail has a length, which is longer than the end of the palm. The center of the palm is called the palm, and there are palm prints on the palm. With the passage of time, the palmprint will deepen, so the palmprint of the elderly is always deeper than that of the newborn. There are fingerprints on the palm and fingers, but not on the back of the hand.

Like other parts of the body, the hand has blood vessels that provide nutrition, nerves that communicate with the brain, and muscles that function through regulation and relaxation under the outermost skin. Below the muscle is the skeleton, which is connected by tendons.

Bones connect with bones to form joints between fingers and wrists. Because of the small size and many joints of the hand, the bones of the hand are generally smaller than those of other parts of the body (except the phalanges).

The hand carries out the instructions of the brain to make actions, and can feel the ambient temperature and the texture of foreign bodies through the skin, and then report to the brain through the neural network. Adult men may have hair on the back of their hands, including the skin on the back of their palms and fingers.