The cardiac cycle is defined as the steps involving the conversion of deoxygenated blood to oxygenated blood in the lungs and pumping it by the heart to the body through the aorta. So i think it would be stable over the years unless u have factors that will affect the cycle depending on a persons health
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Leaching removes nutrients from the soil. The nutrient cycle is slower than in the tropical rainforest as temperatures are not as high, so decomposition is slower, and there is less rainfall.
Budhism, Islam, and christianity are all the main practiced religions in southeast asia
Mass extinctions occur for many reasons. Changes in the environment might make it impossible for the local life to survive, diesease or drought might strike, or there might be a natural disaster. These extinctions make good divisions in geologic time because they are easy to locate over a wide area and mark a definitive change in the Earth's systems.
