In the human body, health is maintained through the interconnectedness of organ systems, proper posture, and stable biochemical metabolism.
Blood oxygen level is an important medical tool used to determine how effectively you are taking oxygen into your body. If you're in good health, normal blood oxygen levels almost always fall within a very predictable range.
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At colleges and universities, anatomy and physiology are often combined into one course. This is because they are branches of the study of biology that are closely related.
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Throughout development from infancy to adulthood, normal vital signs change. Due to anatomical differences, what is normal for one age group could be abnormal for another. Normal pulse rate changes substantially from infancy to middle childhood. By age 12, the normal pulse rate approximates that of an adult.
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