Introduction: Your skin protects your body against heat, light, infection, and injury. It also stores water and fat and produces vitamin D. The skin has two main layers and several kinds of cells. The top layer of skin is called the epidermis. It contains three kinds of cells: flat, scaly cells on the surface called squamous cells; round cells called basal cells; and cells called melanocytes, which give your skin its color.
The inner layer of skin is called the dermis. This layer is thicker, and contains blood vessels, nerves, and sweat glands. The hair on your skin also grows from tiny pockets in the dermis, called follicles. The dermis makes sweat, which helps to cool your body, and oils that keep your skin from drying out. 1
The skin is the body's largest organ. It protects against heat, sunlight, injury, and infection. It helps regulate body temperature, stores water and fat, and produces vitamin D. The skin has two main layers: the outer epidermis and the inner dermis.
The epidermis is mostly made up of flat, scalelike cells called squamous cells. Round cells called basal cells lie under the squamous cells in the epidermis. The lower part of the epidermis also contains melanocytes.
The dermis contains blood vessels, lymphatic vessels, hair follicles, and glands. Some of these glands produce sweat, which helps regulate body temperature, and some produce sebum, an oily substance that helps keep the skin from drying out. Sweat and sebum reach the skin's surface through tiny openings called pores.2
Condition count: 90 ; see list below.
Organ subtypes: subcutaneous tissues (2), skin folds (1)
Organ types: Immune system (144)
Related organs: muscles (60), fat (1), connective tissues (9), hair (12), nails (6)
Organs: all organs
Diseases list: The following list of medical conditions have 'Skin' or similar listed as an affected body part in our database:
1. excerpt from Skin Cancer: NWHIC
2. excerpt from What You Need To Know About Melanoma: NCI
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