VASCULAR SYSTEM DIMENSIONS Internal Length ( Systemic Total Thevmal Typical Diameter (mm) *Velocity Volume Volume E以bratio, Blood Vessel Number (range) (range (mn/9 (ml) Summary Lasth (lem) 1 10-30mm 300-650 500 156 146D00 Aorta 0.D2 460 Main branches 32 5-22mm 33-60 83 62o0 0.002 Large arteries 288 4-5 mm 14-28 134 104 Medium arteries 1152 2.5-4.0mm 10-22 117 Small arteries 3456 1.0-2.5mm 6-17 80 104 858 200 0.03 Tributaries 20,736 0.5-1.0mm 3-13 91 Small rami 82,944 250-500um 2-8 60 57 398 40 0,2 Terminal arteries 497,664 100-250um 1-6 25 5 4.6 1.3 Arterioles 18,579,456 25-100um 0.2-3.8 3.2 5 Metartenoles 238,878,720 10-25um 0.1-1.8 42 5500 Capillaries 1612443136 410画 0511 260 260 20f04 Postcapillary venules 4,408,161,734 8-30um 0.1-0.6 167 0.7 161 8*o3 556 Collecting venules 160,444,500 30-50um 0.1-0.8 1071 Muscular venules 32,088,900 50-100um 0.2-1.0 142 100-200m 0.5-3.2 13 330 15 2.1 Small collecting veins 10,241,508 Terminal branches 496,900 200-600um 1-6 207 3277 19,968 0.6-1.1mm 2-9 15 64 Small veins 16 o.1 512 1-5mm 10-20 67 Medium veins 256 5-9mm 1437 36 476 2206 2600 Large veins 0,905 Main branches 224 9-20mm 20-100 1538 1 20-35mm 200-500 3352 125 150o0 Vena cava 4395 heart 350 lungs 455 TOTAL 5200ml Schneck,DJ.An Outline of Cardiovascular Structure and Function,in The Biomedical Engineering Handbook. Bronzino,JD,Ed-in-Chief,CRC Press,Boca Raton,FL 1995,pp.3-14. Lightfoot,EN.The Roles of Mass Transfer in Tissue Function,in The Biomedical Engineering Handbook Bronzino,JD,Ed-in-Chief,CRC Press,Boca Raton,FL 1995,pp.1656-1670