Figure 4From: Effects of chronic carbon monoxide exposure on fetal growth and development in mice Maternal tissue CO levels in heart, liver, lungs, kidney and brain for each CO exposure. Significance was found in the heart tissue at CO levels ≥100 ppm, in the liver at CO levels ≥ 200 ppm, in both the lung and kidney at the CO level of 400 ppm only and finally in the brain at CO levels of 250 and 300 ppm only (* p < 0.05).Back to article page