Which of the following defines the hard tissue formed from a full-thickness burn?

Eschar is the term used to describe the thick, hard tissue that forms as a result of a full-thickness burn, also known as a third-degree burn. This type of burn extends through the epidermis and dermis, damaging deeper tissues and often resulting in the loss of skin. Eschar appears as a leathery, black or brown dead tissue that can cover the area of the burn, creating a protective barrier but also potentially complicating healing and increasing the risk of infection.

In comparison, scar tissue refers to the fibrous tissue that replaces normal skin after it has healed from an injury, while fungating tissue typically relates to growths associated with tumors rather than burns. Callus is a thickened area of skin that forms in response to friction or pressure, not as a result of burns. Understanding these distinctions helps clarify the specific nature of eschar in the context of burn healing and tissue recovery.