<unk>  is the<unk>  of<unk>  in the cardiovascular system.
The discovery that<unk> s is attributed to William Harvey.
The<unk>  in healthy vessels is generally laminar, however in diseased (e.g. atherosclerotic) arteries the<unk>  may be transitional or turbulent.
Blood flow
Microcirculation
Heat transfer
Muscle tone
Oxygenation
Oxygen permeability
Thermoregulation
Pressure gradient 