How does pressure in the astronaut’s space suit help the body work? A The suit forces blood to certain parts of the body to counteract the absence of gravity. B The suit acts as an external pacemaker to regulate the heartbeat. C The suit regulates gas exchange between the oxygen pack and the astronaut. D The suit monitors the amount of O2 to CO2 in the blood.

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.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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