Table 1.

Blood flow, O₂ uptake, and lactate flux based on cardiovascular properties at rest and rattling

	Blood flow, ml/min	O2 content, mM		O2 uptake, μmol/(s⋅g)	Lactate, mM		Lactate flux, μmol/(s⋅g)
		Arterial	Venous		Arterial	Venous
Rest	5.7  ± 0.7	2.4  ± 0.5	1.9  ± 0.3	0.012  ± 0.005	2.8  ± 1.2	3.0  ± 1.2	0.0043  ± 0.0002
Rattling	14.9  ± 0.5*	2.8  ± 0.1	0.6  ± 0.2*	0.16  ± 0.02*	4.8  ± 0.8	6.8  ± 1.0*	0.18  ± 0.04*

Values are means ± SE for 4 snakes (n = 4–10, except for resting O₂ contents; n = 2). O₂ and lactate fluxes are expressed per gram tailshaker muscle mass. 

^*Denotes significant difference from rest.