Table 3.

Parameters of blood flow

Symbol	Parameter	Value	Units	Reference
${\rho }^b,{\rho }^{\widehat{b}}$	Density of blood	1030	$\text{kg}{\text{m}}^{-3}$	Known
${\mu }^b,{\mu }^{\widehat{b}}$	Dynamic viscosity of blood	0.004	$\text{kg}{\text{m}}^{-1}{\text{s}}^{-1}$	Known
$k^b$	Permeability of blood	$1.5\times {10}^{-10}$	${\text{m}}^2$	Assumed1

¹ This value is estimated based on permeability values used for lung capillaries in Erbertseder et al. (2012). To additionally account for the presence of supplying larger blood vessels within the vascular units, it is scaled by four orders of magnitude, resulting in a value comparable to the permeability of air