The African and South American plate are 4000 km apart. how long ago was this
A. 300 Million Years Ago
B. 260 Million Years Ago
C. 133 Million Years Ago
D. Present Day

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.

what are the options? add them, then i will be glad to .