What defines a closed wound?

A closed wound is characterized by injury to the underlying tissues without breaking the skin's surface. This type of wound may involve damage to muscles, tendons, or even organs, but the external layer—the skin—remains intact. This distinction is important as it influences the treatment and management of the wound. For instance, closed wounds can cause internal bleeding or swelling, which may not be immediately visible. Understanding that a closed wound does not manifest as a break or opening in the skin helps in assessing the severity and potential complications associated with the injury.

The other options describe different kinds of injuries or situations. For instance, a wound that breaks the skin refers to an open wound, which allows direct exposure to bacteria and increases the risk of infection. A wound with no visible blood does not adequately describe the nature of a closed wound since closed wounds may still be serious. Lastly, a superficial rash or bruise typically represents minor injuries or skin conditions rather than a true closed wound, which involves more significant underlying tissue damage.