Skin is technically the largest organ in your body that functions as sensory and mechanical barrier organs with vitamin D synthesis capabilities. The cells that make up the skin include keratinocytes, melanocytes, dendritic dells, and inflammatory cells like lymphocytes. The skin contains adnexal components that aid with homeostasis that including apocrine sweat glands, eccrine sweat glands, and hair follicles. The skin also contains sensory nerve fibers.