Aorta Artery Arteriole Sphincter Capillary Venule ena cava ○ ○ Inner diamter 4mm 30μm35 8um 20pm 5mm 3 2mm Imm 20 30J lpm2μm0.5mm 1.5mm Endothelium Elastic fiber Smooth muscle Collagenous fiber 劬时能Q爆胁 Comparision of the inner diameter, wall thickness and components between different blood vessels