Zambia is in Southern Africa, east of Angola, between 150 00 S and 300 00 E with an area of 752,614 sq km out of which 740,724 sq km are land and 11,890 sq km water (The World Factbook, 2006).
-There are two main parts of the striation pattern of skeletal muscle fibers: * The light bands (I bands) are made up of tink filaments of actin attached to Z lines.*The dark bands (A bands) are made up of thick filaments of myosin that overlap thin filaments of actin.There are two main parts of the striation pattern of skeletal muscle fibers: * The light bands (I bands) are made up of tink filaments of actin attached to Z lines.
Each muscle fiber is multinucleated cylindrical cell containing groups of myofibrils. The myofibrils are in turn made up of myofilaments of three types namely actin, myosin, and tropomyosin. Thus the skeletal muscles have three structural levels namely muscle fibers, myofibrils and myofilaments. Examples of skeletal muscles include all muscles of body wall. Smooth muscles: