Which of the following are known as the resistance vessels?

The small aeries and aerioles are referred to as resistance vessels because they are the principal site of the peripheral resistance. The veins are impoant blood reservoirs of blood and therefore called capacitance vessels. Also know: At rest, at least 50% of the circulating blood volume is in the systemic veins, 12% is in the hea cavities, and 18% is in the low-pressure pulmonary circulation. Only 2% is in the aoa, 8% in the aeries, 1% in the aerioles, and 5% in the capillaries. When extra blood is administered by transfusion, less than 1% of it is distributed in the aerial system (the "high-pressure system"), and all the rest is found in the systemic veins, pulmonary circulation, and hea chambers other than the left ventricle (the "low-pressure system"). Ref: Barrett K.E., Barman S.M., Boitano S., Brooks H.L. (2012). Chapter 31. Blood as a Circulatory Fluid & the Dynamics of Blood & Lymph Flow. In K.E. Barrett, S.M. Barman, S. Boitano, H.L. Brooks (Eds), Ganong's Review of Medical Physiology, 24e.