Kind of vessel	Diameter (mm)	Number	Total x-sect. area (cm2)	Total surf. area (cm2)	Length (cm)	Total blood vol. (cm3)
Aorta	10	1	0.8	125	40	30
large arteries	3	40	3.0		20	60
Main artery branches	1	600	5.0		10	50
Terminal branches	0.6	1,800	5.0		1	25
Arterioles	0.022	40,000,000	125	50,000	0.2	25
Capillaries	0.008	1,200,000,000	600	300,000	0.1	60
Venules	0.03	80,000,000	570		0.2	110
Terminal veins	1.5	1,800	30		1	30
Main venois branches	2.4	600	27		10	270
Large veins	6.0	40	11		20	220
Vena cava	12.5	1	1.2	157	40	50
{A (arterial side) = 190 cm3; B (venous side) = 740 cm3; capillaries hold relatively little blood.}