A 7-year-old child accidentally touches a hot stove, resulting in redness on his palm without blisters.What layer of the skin is affected?

Choice A rationaleThe epidermis is the outermost layer of the skin, providing a protective barrier against the external environment. A first-degree burn, characterized by redness and pain without blisters, affects only this superficial layer. The heat causes vasodilation in the dermal blood vessels beneath the epidermis, resulting in the visible redness.Choice B rationaleThe dermis is the layer of skin beneath the epidermis, containing structures like hair follicles, sweat glands, and nerve endings. Second-degree burns extend into the dermis, causing damage to these structures and leading to blister formation due to fluid leakage from damaged blood vessels within this layer.Choice C rationaleThe subcutaneous tissue (hypodermis) is the deepest layer of the skin, composed mainly of fat and connective tissue. Third-degree or full-thickness burns extend into this layer, damaging or destroying it along with the epidermis and dermis.Choice D rationaleMuscle tissue lies beneath the subcutaneous tissue and is not typically directly affected in a superficial burn that only causes redness without blisters. Burns that reach muscle tissue are very deep and would present with significant tissue damage and likely charring.