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Skeleton of the extremities
Last reviewed: 23.04.2024
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In the process of human evolution, the upper limbs became the organs of labor. Lower limbs perform the functions of support and movement, keep the human body in an upright position.
The upper limb as an organ of labor in man has acquired great mobility. Clavicle - the only bone that connects the upper limb with the bones of the trunk, it allows you to perform extensive movements. In addition, the bones of the upper limb are more articulate with each other than the bones of the lower limb. In the area of the forearm and hand, bones are adapted to various complex, subtle types of labor.
The lower limb as an organ of support and movement of the body in space consists of thicker and more massive bones. The mobility of these bones is less relative to each other than that of the upper limb.
The skeleton of the upper and lower limbs of a man is distinguished by a belt and a free part. The belt of the extremities (upper and lower) is more or less mobilely connected to the bones of the trunk. The bones of the free parts of the limbs are connected to each other with the help of joints and ligaments. The skeleton of each free part of the limb (both upper and lower) is distinguished by a proximal section consisting of one long tubular bone, the middle section formed by two bones also of tubular form, and the distal part: in the upper limb these are the bones of the hand, feet.
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