Although it may appear that all human beings are physically the same, this is not true. For example, some people have an extra rib while others have extra teeth. Some people also have a single large kidney while most others have two. Even the way arteries, veins and nerves are distributed throughout the body can differ significantly. A few rare people also have all their organs reversed left to right. These differences are not abnormal. These are just differences in the way each human being’s body developed. On a more subtle level, human bodies respond differently to food and exercise. This is the reason why some people are naturally bigger sized despite not consuming large amounts of food, while others tend to be very thin despite consuming large amounts of food. Different people also start to lose their hair at different ages and have different levels of tolerance towards extreme weather conditions.
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