Final answer:
The degree of burns in an adult is classified into four categories: 1st degree, 2nd degree, 3rd degree, and 4th degree. First-degree burns affect the epidermis, second-degree burns affect the epidermis and dermis, third-degree burns extend into the dermis, and fourth-degree burns affect muscle and bone.
Step-by-step explanation:
The degree of burns in an adult is classified into four categories: 1st degree, 2nd degree, 3rd degree, and 4th degree.
A 1st degree burn is a superficial burn that affects only the epidermis. It is painful and swollen but typically heals on its own within a few days.
A 2nd degree burn goes deeper and affects both the epidermis and a portion of the dermis. It results in swelling, blistering, and pain, requiring clean and sterile care for proper healing.
A 3rd degree burn fully extends into the epidermis and dermis, destroying tissue and affecting nerve endings. These burns require medical attention and heal slowly without it.
A 4th degree burn is the most severe, affecting muscle and bone. These burns are usually not as painful due to nerve damage and require extensive medical intervention for repair.