MUSCLE PHYSIOLOGY

Detailed explanation-1: -The sarcomere is the smallest functional unit of a skeletal muscle fiber and is a highly organized arrangement of contractile, regulatory, and structural proteins.

Detailed explanation-2: -A myofibril is composed of many sarcomeres running along its length, and as the sarcomeres individually contract, the myofibrils and muscle cells shorten (Figure 3). Myofibrils are composed of smaller structures called myofilaments.

Detailed explanation-3: -Sarcomeres are the smallest functional contractile unit of muscle, and myofibrils are striated muscle organelles that are comprised of sarcomeres that are strictly aligned in series.

Detailed explanation-4: -muscle fiber. myofilament. myofibril. muscle fasciculus.