microcirculation

microcirculation: is the blood flow through blood vessels smaller than 100 micrometer (arterioles, capillaries, and venules)
blood flow coming from the arterioles to the capillaries, at the capillaries we have the exchange and then leave to the venules.
function of the microcirculation: transporting blood cells and substance to/from the tissues.
vasomotion: is theregulationg of blood flow to the capillaries depend on the tissue need by opening and closing of the precapillary sphincter
oxygen (O2) is the most important factor affects precapillary sphincter, when the tissues need O2, the precapillary will dilate and relax vice versa.

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