Having finished the anatomy and physiology of the skin, we are beginning a study of what would follow naturally, cosmetics. A series of questions led Sam to a working definition of cosmetics: A substance used to enhance or alter the appearance. Samantha outlined areas where this enhancement or alteration would most likely be used, such as the face, hair and lips. Chemical compounds or mixtures of compounds, all of which we have studied previously... Their derivation, either from natural sources or synthesis was discussed, including the fact that synthetic or artificial does not mean toxic or bad. The breakdown of the term cosmetics into their common categories was started.