[The physiologic and physical patterns of blood heat exchange with tissues and the environment]

The temperature of arterial blood flowing to the ear and of venous blood outflowing from the latter was measured initially and under heat load in anesthetized rabbits. The partial calorimeter yielded the values of heat production from the ear (in cal/min). Heating of the animal increased the blood flow and the heat production (4- and 5-fold, resp.), the arterio venous difference remaining practically unaltered (0.8-0.9 degrees C).