The skin is the largest and one of the most important organs of the body because it is the bodies first line of. defense against disease. Healthy skin is slightly moist, soft, and flexible with a smooth, fine-grained texture. The slightly acidic pH of healthy skin provides a protective response against organisms that touch or try to enter it. Ideally, the skin should be free of blemishes and other disorders and have the ability to renew itself.
Skin varies in thickness. It is the eyelids and thickest on the palms of the hands and sole of the feet. Continued pressure over any part of the skin can cause it to thicken and become calloused. The skin of the scalp is constructed similarly to the skin elsewhere on the human body, but the scalp has larger and deeper hair follicles to accommodate the longer hair on the head. The appendage of the skin is hair, nails, sweat glands, and oil glands. The skin is constructed of two clearly defined divisions, the epidermis, and the dermis. (Milady's Standard Professional Barbering)