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What is the study of skin's functions known as?

  1. Skin physiology

  2. Dermatology

  3. Excoriation

  4. Tendons

The correct answer is: Skin physiology

Skin physiology is the study of the functions of the skin, making it the correct answer. Dermatology, on the other hand, is the study of skin diseases and disorders, which is not the same as studying its functions. Excoriation refers to damaging or removing layers of skin, which is not the same as studying its functions. Tendons refer to the connective tissues that attach muscles to bones, which is not related to the study of skin's functions.