What is the density of a 700 kg about with a volume of 649 m3

The formula for density is mass over volume. In this problem the mass is 700 kg and the volume is 649 m^3. Thus, you would divide 700 by 649 to get a density approximately equal to 1.079. Hope this helped :))

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.