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
Body Worlds any connection between the closed Chinese exhibition and his Body Worlds franchise. Similar exhibitions had already been successfully staged in Lyon and Marseille. The UK Parliament created legislation for exhibits of human remains, including plastinated bodies and body parts, in England and Wales under the Human Tissue Act 2004. This requires a licence to be granted by the Human Tissue Authority. The Human Tissue Act superseded the Anatomy Act 1832, which had been found by an independent commission (The Redfern Report) to be inadequate on contemporary collection and use of human tissues, following the Alder Hey organs scandal. In March