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The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

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A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

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Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

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This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..