TABLE II.

Geometrical Features of the Growth Model, Previous Morphometry Studies, and Previous Models

		Growth model	Morphometry	Other Models
θ	Airways	43.76 ±0.51 (range: 42.96–44.47)	39,43 [41]; 37.28 [42]	50.31 [24]; 42.90 ±0.10[43]
	Arteries	44.84 + 0.30 (range: 44.46 – 45.26)	-	47.29 [25]
	Veins	44.56 ± 0.41 (range: 43.97 – 45.19)	-	51.52 [25]
	Airways	3.45 ± 0.05 (range: 3.40 – 3.53)	3.09,3.14[41]; ~3.25 [44]	2.92 [24]; 3.0[45] 4.67 ± 0.47 [43]
	Arteries	4.05 + 0.12 (range: 3.86 – 4.22)	-	-
	Veins	4.35 ± 0.09 (range: 4.21 – 4.48)	-	-
$\frac{D_d}{D_p}$	Airways	0.78 ± 0.00 (range: 0.78 – 0.79)	0.76 [46]; 0.78, 0.83 [41]	0.79 [24] 0.82 ± 0.00 [43]
	Arteries	0.73 ± 0.01 (range: 0.72 – 0.74)	-	-
	Veins	0.73 ± 0.01 (range: 0.72 – 0.74)	-	-
RbS	Airways	2.48 ± 0.08 (range: 2.34 −2.58) (R2= 0.99 + 0.01)	2.51–2.81 [38]	2.80 [24] (R2 = 1.00)
	Arteries	2.96 ± 0.53 (range: 2.54 – 4.05) (R= 0.96 + 0.04)	3.03 [36] 3.11 [14] 3.36 [20]	3.04 [25] (R2 = 1.00)
	Veins	3.46 ± 0.29 (range: 3.15–4.01) (R2= 0.96 + 0.01)	3.30 [38] 3.33 [20]	3.41 [25] (R2 = 1.00)
RdS	Airways	1.43 + 0.03 (range: 1.37 −1.46) (R3= 0.94 ± 0.02)	1.35–1.45 [38]	1.41 [24] (R2 = 0.98)
	Arteries	1.58 + 0.03 (range: 1.54–1.62) (R2= 0.91 + 0.01)	1.56 [20] 1.60[36] 1.56, 1.60 [14]	1.57 [25] (R2 = 1.00)
	Veins	1.59 + 0.04 (1.55–1.67) (R2= 0.93 ± 0.02)	1.58 [20] 1.69 [38]	1.66 [25] (R2 = 1.00)
RlS	Airways	1.37 ±0.02 (range: 1.34 −1.40) (R2= 1.00 ±0.01)	1.33–1.46 [38]	1.39 [24] (R2 = 0.95)
	Arteries	1.34 + 0.03 (range: 1.28 −1.39) (R2= 0.96 ± 0.03)	1.46 [14] 1.49 [36] 1.49 [20]	1.50 [25] (R2 = 0.95)
	Veins	1.29 + 0.01 (range: 1.28 −1.33) (R2= 0.99 ± 0.01)	1.50 [20] 1.68 [38]	1.64 [25] (R2 = 0.94)

Results are in mean ± standard deviation and the range of the values. R² is the coefficient of determination and indicates the goodness of the fits. θ=branching angle; $\frac{L}{D}$ = length to diameter ratio; $\frac{D_d}{D_p}$ = daughter to parent diameter ratio: R_bS, R_dS, R_lS = branching, diameter, and length ratios.