Musculoskeletal, nervous, respiratory, and circulatory systems in Essay

Musculoskeletal, nervous, respiratory, and circulatory systems in ergonomics - Essay Example The human skeleton has 206 bones. The bones’ mobility is dependent on muscle contraction. Every muscle is attached by a connective tissue to two or more bones. First, the spine enables bending, twisting, and holding the body in an upright position, along with providing an avenue through the spinal cord for the brain to communicate with the whole body. Fixed postures and prolonged seating causes low back pain. This is as a result of a shift in position of the spine discs. Second, muscles contain thousands of tiny aligned fibers. Muscles are responsible for the movement in the human body. Muscles function to produce motion and force. It generates force by contraction. Muscles use a lot of nutrients and oxygen. The muscle activity results in the production of metabolic wastes, such as, lactic acid and CO2. In this perspective, prolonged muscle contraction increases muscle fatigue and risk of injury (Kahn & Line, 2008). Third, tendons are tough and flexible band of fibrous connective tissue which joins muscles to bones. They transfer forces and movements from the muscles. Most of them run through guiding sheaths and do not stretch. Tendinitis is an inflammation of the tendon that causes point swelling. Next, ligaments are groups of dense, white, fibrous elastic tissue. A ligament connects bones to bones in order to form a joint. Majority of the ligaments limit dislocation. They stabilize and support the joints by holding the joints together. A sprain causes the fibrous elastic tissues to stretch or get torn from the bone (Pheasant & Haslegrave, 2011). Fifth, fascia is a thin, gelatinous membrane that surrounds and is fused with the blood vessels, muscles, bones, tendons, nerves, and organs throughout your body. It supports, connects, and compartmentalizes various body parts. Strain stretches the fascia leading to pain. Lastly, bursa is fluid-filled sac located at bone joints and it is lined with a synovial membrane. It