The entire body's skeletal system, which supports and shapes the body and its structures, is made up of all the bones, cartilages, and ligaments. The bones that make up the body make up the skeleton. The skeleton of an adult has 206 bones. Because certain bones join together during infancy and adolescence to produce an adult bone, younger people have more bones overall.
The skeleton's main purposes are to create a solid internal framework that can maintain the body's weight against the pull of gravity and to act as a platform for muscles to contract and relax in order to move the body.
The lower portion of the skeleton is specialized for
stability during walking or running. In contrast, the upper skeleton has
greater mobility and ranges of motion, features that allow you to lift and
carry objects or turn your head and trunk.
The lowest part of the skeleton is designed specifically for stability when running or walking. The upper skeleton, on the other hand, has higher ranges of motion and mobility, which enable you to lift and carry items as well as tilt your head and trunk.
The skeleton has a variety of purposes, including storage and defence in addition to supporting and allowing for mobility of the body. Internal organs such as the brain, spinal cord, heart, lungs, and pelvic organs are all safeguarded by it. The skeleton's bones act as the body's main repository for vital minerals including calcium and phosphorus. The body's blood-cell-producing tissue is housed in the bone marrow, which is found inside bones.
The axial and appendicular divisions are the two main
divisions of the skeleton.
The Skeleton of Axial
The axial and appendicular divisions are the two main divisions of the skeleton. All of the bones in the head, neck, chest, and back are part of the axial skeleton, which serves as the body's vertical axis. It protects the heart, lungs, spinal cord, brain, and other vital organs. Additionally, it is where the muscles that move the head, neck, and back attach, as well as the muscles that work on the shoulder and hip joints to move the respective limbs.
The skull, vertebral column, and thoracic cage are among the
80 bones that make up an adult's axial skeleton.
There are 22 bones in the skull. Seven more bones, including the hyoid bone and the ear ossicles, are also connected to the head (three small bones found in each middle ear). A vertebra is any of the 24 bones that make up the vertebral column, including the sacrum and coccyx. The sternum, the flattened bone of the front chest, and the 12 pairs of ribs make up the thoracic cage.
The Skeletal Appendix
All of the bones in the upper and lower limbs as well as the bones that connect each limb to the axial skeleton are part of the appendicular skeleton. The mature appendicular skeleton has 126 bones. The appendicular skeleton's bones are covered separately.