The eyelids are thinner still. The outer layer of the epidermis consists of dead or keratinised cells that have no protective oils and it is these cells that become dry and flaky if not correctly treated. The outer layer of dead skin cells should be continually shed. Further down in the epidermis is the basal layer which is responsible for making new epidermal cells. This pigment is responsible for the natural colour of our skins and darkens in response to sun exposure causing tanning.
All people have the same amount of melanocytes per square centimetre of skin.
It is the amount and type of melanin produced that determines the natural colour of the skin. The dermis is much thicker than the epidermis and consists of numerous structures. Lymphatic vessels which drain waste products such as proteins, water, and salt. Sensory nerve endings carry sensations of touch pain and cold to the brain. Sweat glands which help regulate body temperature and get rid of waste materials.