What is the differences between smooth,skeletal and cardiac muscles?
Skeletal muscle is attached to the bones of the skeleton which you use for making voluntary movements. The biceps and triceps are skeletal muscles. Skeletal muscle looks stripey when seen with a light or electron microscope. The stripes are produced by a regular pattern of protein filaments which are lined up to form alternating light and dark bands. Skeletal muscle fibres are very large cells. They can be up to 80 micrometres in diameter and many centimetres long. Each cell has many nuclei which lie close to the cell surface. Inside the cell there are several bundles of myofibrils, containing actin and myosin, which run along the whole length of the cell. Large numbers of mitochondria lie alongside the myofibrils, mostly between them and the cell surface membrane. Cardiac muscle is found only in the heart. Cardiac muscle differ from skeletal muscle in several ways. The fibre are smaller, each one being about 80 micrometres long and 15 micrometres in diameter. Each cell has one nucleus
