Fig. 2

Analysis of bifurcations (branchings). The validity of Murray’s law in the left anterior descending coronary resistance artery network was checked. The sum of the cube of the lumen radii of daughter branches was plotted against the cube of the lumen radius of the mother branch in logarithmic scale. a Control and exercised males; b control and exercised females. The line connects points where Murray’s law is valid. Note substantial adherence to the line in all four groups. Deviations from the theoretical value were not significantly different in any of the comparisons