Choose the mass extinction of most interest to you. cretaceous-tertiary end triassic permian-triassic late devonian ordovician-silurian you'll create a graphic representation of the three stages of one of the mass extinctions, as shown in the following table. can someone me? i have to be at three places at once.

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.