how much surface area does our skin cover
Integumentary System. The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands. The skin is only a few millimeters thick yet is by far the largest organ in the body. The average personâs skin weighs 10 pounds and has a surface area of almost 20 square feet. Skin forms the bodyâs outer covering and forms a barrier to protect the body from chemicals, disease, UV light, and physical damage.