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Posts Tagged ‘muscle movement’

The bones of the skeleton provide structural support for the body and work with the muscles to move it. Bones also have other functions:

• Some bones protect the vital organs. The skull acts as armor for the brain, and the pelvic hones keep abdominal organs from being damaged. The movement of the ribs aids the process of breathing and they also protect the organs of the chest, such as the heart and lungs.
• The bones of the ear help with hearing. They act as amplifiers when sound passes from the outside world through on its way to the brain.
• The bone marrow inside flat bone as the shoulder blades and breastbone a range of blood cells.

THE JOINTS

• A joint is the junction between two or more bones. Some joints are fixed, such as of the skull, while others, such cartilaginous joints between the vertebrae of the spine, have hardly any However, most joints in the both freely and are known as Synovial joints. The ends of the bones meeting at synovial joints are covered with a thin layer of cartilage to stop them grinding against each other. They are lubricated, to allow smooth by a thin layer of fluid called Synovial fluid. The ligaments are strong fibrous strips that hold bones together at the joint them from moving too far apart.

The musculoskeletal system is made up of the bones of the skeleton, joints that link the bones together and the muscles that enable the body to move. At birth, a baby has around 350 bones, some of which rise together as it grows. Adults usually have 206 bones, though some have extra ribs and others have fewer. The body’s larges bone is the femur in the thigh and its smallest is the tiny stapes in the ear. The muscles and ligaments act with the bones to produce a range of movements, from precision threading of a needle to the most vigorous exercise. Read the rest of this entry »