Air contains 78 percent, nitrogen 21 percent oxygen, and one percent argon. which gas is the solvent?
oxygen
nitrogen
argon
none of the above

its B. Nitrogen , I had to answer this question too, and i clicked the wrong answer so its actually B

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

idk lol use google m8