Table 2.

Physiological breathing parameters and PM inhaled fraction (inhalability) in mice and rats.

Variables	Mouse	Rat	Authors
Body mass, Bw (kg)	0.025	0.250	[6]
Tidal volume, Vt (mL)	0.218	2.100	[7]
Minute volume, Vm (mL/min)	60.4	252.0	[7]
Breathing frequency, f (min−1)	277	120	[7]
Inhalability, I (%)
PM1	88	92	[4]
PM2.5	67	75	[4]
PM10	20	25	[4]