Systole heart beats—is cued by messages from the brain, reflecting the brain's responses to conditions of the body, such as pain, emotional stress, level of activity, and to ambient conditions including external temperature, time of day, etc. Electrical systole opens voltage-gated sodium, potassium and calcium channels in cells of myocardium tissue. Subsequently, a rise in intracellular calcium triggers the interaction of actin and myosin in the presence of ATP which generates mechanical force in the cells in the form of muscular contraction, or mechanical systole. The contractions generate intra-ventricular pressure, which is increased until it exceeds the external, residual pressures in
History of beliefs about the human body be detected. Definitions of the body and it's disorders therefore focus on physical manifestations of energy through the body. This is mostly seen in Chinese Traditional Medicine and has today been explained in physical ways by modern science. The ideal body of east Asian medical literature was not muscular and instead focused on key energy manifestations in the body for directed therapy. The Yellow Emperor's Body is a term derived from the references to the Yellow Emperor within the Ancient Chinese book, the "book of change". The Term describes the references to both the physical body that can be touched,