TABLE 20.1 Morphometric parameters for several biological trees Network RB RL RD:Reference Bronchial tree: 19 Rat 3.31 1.83 1.53 Hamster 3.26 1.92 1.0 Sheep 3.55 145 1,69 Dog 3.37 1.64 1.55 Human 2.31 1.40 1.43 Circulatory tree: Pulmonary arteries 299 1.49 1.59 20 358 1.81 1.72 102 Hepatic vein 3.39 4.4e 4。, 14 Portal vein 4,08 4。 ,。 14 Rabbit omentum: Arterioles 3.12 1.61 1.30 Venules 2.30 1.56 135 Human bulbar conjunctiva: 21 Arterioles 2.77 1.36 1.26 Venules 2.80 1.41 1.51 Cat sartorius 3.35 186 125 104 muscle arterioles