A closed injury typically caused by blunt trauma is known as what?

A closed injury resulting from blunt trauma is referred to as a contusion. This type of injury occurs when small blood vessels are damaged due to a direct impact, leading to bleeding under the skin without breaking the skin's surface. The resulting discoloration, often purple or blue, is commonly known as a bruise. Contusions can occur in various parts of the body, depending on the site of the trauma, and while they are generally less severe than open injuries, they can still result in swelling and pain.

Other choices do not represent closed injuries caused by blunt trauma. A concussion is a type of traumatic brain injury that can occur from a forceful impact to the head, but it specifically pertains to brain function and does not refer to a physical closed injury to soft tissues. An abrasion involves the scraping or rubbing away of skin, usually exposing the underlying tissue, which makes it an open injury. A fracture involves the breaking of a bone, which may be closed (without breaking the skin) or open (where the broken bone pierces the skin), but is not classified specifically as a closed injury caused by blunt trauma like a contusion.