This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
Largest cross - sectional area 
Select and explain. 
A. Artery, B. Veins, C. Capillaries, D. Venules
C: Capillaries
Answer: C: Capillaries 
Explanation: Ans. (c) CapillariesRef: Ganong, 25th ed/p.568Vessel with,Maximum cross-sectional area - capillariesMinimum cross-sectional area - aortaMaximum blood flow velocity - aortaMinimum blood flow velocity - capillariesMaximum diameter - vena cavaMaximum % of blood stored - VeinsResistance vessels - arteriolesCapacitance vessels - veinsExchange vessels - capillariesWindkessel vessel - aortaFor temperature regulation - AV shuntsMaximum smooth muscle content - arterioles