The hand (manus) is defined as the distal portion of the upper limb extending from the wrist joint to cover the fingertips. It is consisted of the bony / cartilaginous skeleton, tendons, muscles and connective tissue which create one of the most sensitive part of the human body. The hands are precisely controlled by brain impulses and spinal reflexes that help you with the finest execution of movements. Beyond the anatomic role of capturing the objects, the hand is the tool of human creativity and expression taking part in communication therefore had a great impact on human development. A symbol of strength and tenderness at the same time, which manifestation can be detected in social relationships by far the most beautiful way (let's just think of a parent/child relationship, a "vindicatory hand"). Its complexity is obvious when you think that replacement of the human hand is not yet solved even in the century of robotics and informatics.

Your handspan is the distance from the tip of the thumb to the tip of the little finger on the outstretched hand.