Which statement best describes the motion of air particles in a sound wave? OA. They move in the direction opposite to that of the wave.
OB. They move all around the wave.
OC. They move in the same direction as the wave.
OD. They move at right angles to the wave.

the answer is b: 1.4 km/hr

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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.