MEDICAL PHYSIOLOGY

Detailed explanation-1: -First-degree burns affect only the outer layer of skin, the epidermis. The burn site is red, painful, dry, and has no blisters. Mild sunburn is an example. Long-term tissue damage is rare and often consists of an increase or decrease in the skin color.

Detailed explanation-2: -Burn degrees. There are three degrees of burns: first-degree burns (superficial burns), second-degree burns (partial-thickness burns) and third-degree burns (full-thickness burns). These burn classifications are based on how deeply the skin is burned.

Detailed explanation-3: -Superficial partial-thickness burns characteristically form blisters within 24 hours between the epidermis and dermis. They are painful, red, and weeping and blanch with pressure (picture 2). These burns generally heal in 7 to 21 days, and, though scarring is unusual, pigment changes can occur.

Detailed explanation-4: -Second-degree burns (also known as partial thickness burns) involve the epidermis and part of the dermis layer of skin. The burn site appears red, blistered, and may be swollen and painful.

Detailed explanation-5: -Superficial or epidermal burns involve only the epidermal layer of skin. Partial-thickness burns involve the epidermis and portions of the dermis. Full-thickness burns extend through and destroy all layers of the dermis.