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. 2018 May 23;9:581. doi: 10.3389/fphys.2018.00581

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Copyright © 2018 Razavi, Shirani and Kassab.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Relationship between the normalized crown length (L_c/L_c,max) and normalized number of capillaries (N_c/N_c,max) for the full asymmetric porcine arterial tree shown in a log-log scatter plot: (A) RCA, right coronary artery; LAD, left anterior descending artery; LCx, left circumflex artery. The total number of data points shown in (A–C) are 838,462, 950,014, and 575,868; respectively. The dash lines correspond to the theoretical value of 1 predicted by Equation (7). The scaling exponents obtained from the least square fit of each data set are close to the theoretical value of unity. The values of exponents, the confidence interval and R² for each species and organ are summarized in Table 2.