Energy, heat and power of the body: conservation of energy in the body, energetic body changes, work and power, heat loss mechanisms of the body, thermoregulation mechanisms. Pressure in the body: measure the pressure in the body, pressure of various parts in the body, tension on the skeleton. Osmosis: transport of substances in liquid solutions and through membranes, regulation of the interstitial fluid. Physics of the cardiovascular system: the main parts of the cardiovascular system, the work of the heart, pressure and measurement of blood pressure on the vessel wall, blood flow velocity, laminar and turbulent flow. Electric and magnetic signals from the body: electrical potentials in cells, electrocardiogram and the Einthoven triangle, the neuron and electroencephalography, magnetic signals from the heart and the brain. Physics of vision: the parts of the eye, the threshold of vision, visual acuity, defective vision and its correction.