MICROANATOMY

Detailed explanation-1: -Skeletal and cardiac muscle are referred to as striated muscle because of the visible organization of repeating units of contractile filaments, known as sarcomeres, into cylindrical bundles called myofibrils.

Detailed explanation-2: -The smallest contractile unit of a skeletal muscle is called a sarcomere. The sarcomere consists of overlapping actin and myosin myofibrils that slide past one another shortening the sarcomere and thus causing a contraction and movement to occur.

Detailed explanation-3: -A sarcomere is the basic contractile unit of a myocyte (muscle fibre). A sarcomere is composed of two main protein filaments (thin actin and thick myosin filaments) which are the active structures responsible for muscular contraction.

Detailed explanation-4: -A sarcomere (Greek sarx “flesh", meros “part") is the smallest functional unit of striated muscle tissue. It is the repeating unit between two Z-lines. Skeletal muscles are composed of tubular muscle cells (called muscle fibers or myofibers) which are formed during embryonic myogenesis.