all you need to know about your skin


Skin is the exterior organ that covers the human body, as well as the body of other vertebrates. It is the first layer that comes in contact with exterior factors, helping to protect us from external dangers. Because of its dense network of sensitive nerve endings, skin acts as a sensory organ as well. It also helps regulate our body temperature and is capable of activating vitamin D after UV exposure.

Skin thickness varies greatly across the human body; it is thinnest around the eyes, where wrinkles tend to first appear, while the heels and palms are covered with notably denser skin.

It was long believed that skin was an impermeable barrier. Although it is true that skin does not allow bigger compounds to penetrate it, such belief was revised after the skin was found to be permeable to many substances, including most skincare products. This permeability can allow the introduction of chemicals (such as coal tar and phthalates) into the human body. The skin can also be a targeted port of entry for numerous drugs, whose active ingredients (such as hormones or nitroglycerin) are delivered to the circulatory system, via the skin, through medicated creams, ointments, or patches.








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