The flow of blood to and from the heart is very systematic. Whenever there is an increase in energy demand in a certain part of the body, mainly because of elevated metabolic activity in organs or tissues, blood vessels will passively swell. This is because of the high intravascular pressure exerted into it. The metabolic processes are directed to the regulation of oxygenation. This also means that if there is an increase in any physical activities, there is also an increase in metabolic processes.When it increases, higher energy is demanded by the organs involved which are compensated by increased Continue reading...