Blue arrows represent deoxygenated blood flowing through the right side of the heart to the lungs, and red arrows represent oxygenated blood leaving the lungs through the left side of the heart. (tampabayvets.net)
In other words, what are the genes that are sending the signal to these lung BMICs to leave the lung tumour, go into the blood stream, invade the blood - brain barrier and form a tumour in the brain.» (sciencedaily.com)
Air leaving the lungs is 78 percent nitrogen, 16 percent oxygen, and 4 percent carbon dioxide — depleted in oxygen and enriched more than a hundredfold in carbon dioxide compared with what went in, due to human metabolism. (discovermagazine.com)