Partial-thickness wounds involve which skin layers?

Partial-thickness wounds involve which skin layers?

• A. Epidermis only
• B. Dermis only
• C. Epidermis and dermis
• D. Muscle or bone

Answer: (C)

Partial-thickness wounds affect both the epidermis and the superficial portion of the dermis. They extend beyond the outer protective layer but stop before reaching deeper tissues such as muscle or bone. This distinguishes them from full-thickness wounds, which go through the dermis into subcutaneous tissue and beyond. Because part of the dermis remains, healing can occur by re-epithelialization from the remaining epidermal cells at the wound edges and from dermal appendages like hair follicles and sweat glands. The presence of dermal nerves also explains why these wounds can be painful. Blister formation is common when the epidermis separates from the dermis. In short, partial-thickness wounds involve the epidermis and dermis, not deeper structures.

Partial-thickness wounds affect both the epidermis and the superficial portion of the dermis. They extend beyond the outer protective layer but stop before reaching deeper tissues such as muscle or bone. This distinguishes them from full-thickness wounds, which go through the dermis into subcutaneous tissue and beyond.

Because part of the dermis remains, healing can occur by re-epithelialization from the remaining epidermal cells at the wound edges and from dermal appendages like hair follicles and sweat glands. The presence of dermal nerves also explains why these wounds can be painful. Blister formation is common when the epidermis separates from the dermis.

In short, partial-thickness wounds involve the epidermis and dermis, not deeper structures.