what do capillaries do what do capillaries do in the body what do capillaries do in the heart what do capillaries diffuse what do capillaries connect what do capillaries consist of what do capillaries connect to venules what do capillaries connect arteries to what do capillaries look like what are capillaries and what do they do capillaries what do they do what do your capillaries do what do blood capillaries do what do arteries veins and capillaries do what do lymphatic capillaries do