for movement, stabilization of body position, regulating organ volume, and thermogenesis

skeleton for the head, skeleton for the body, and the skeleton that functions as the limbs

keeps the body upright and provides a framework for attachment of muscles and tissues

During mild and moderate exercise, ATP is obtained from oxidative phosphorylation which requires O2

shaped like a spindle, the largest in the middle and the two ends are tapered. has fibers that run the same length as the myofibrils. Myofilaments and each myfilament consist of muscle proteins, namely actin and myosin. Smooth muscles move regularly, and don't tire quickly

cylindrical or tubular in shape and have multiple nuclei, located at the periphery, 2.5 cm long and 50 microns in diameter. The striated muscle cells at the ends do not show clear boundaries and the myofibrils are not homogeneous as a result, transverse fibers appear.

found only in the heart (core), has a special ability to carry out automatic contractions and movements without depending on the presence or absence of nerve stimulation.Contractions are not affected by the nerves, the function of the nerves is only to speed up or slow down the contractions because it is called an involuntary muscle

formed by a matrix of fibers and protein hardened with calcium, magnesium phosphate, and carbonate. These materials originate from hyaline cartilage embryos through osteogenesis then become bone, this process is carried out by cells called osteoblasts. There are 206 bones in the body which are classified as long, short, flat, and irregular, according to their shape