What type of trauma occurs without penetration of the body?

Blunt trauma refers to injuries sustained from a forceful impact that does not break the skin or penetrate the body. This type of trauma can arise from various scenarios, such as a fall, being struck by an object, or a motor vehicle accident. The key characteristic of blunt trauma is that it involves external force causing injury to body tissues without creating an open wound.

In contrast, the other types of trauma mentioned involve penetration or breakdown of the skin. Puncture trauma entails a small hole being created in the body, often from sharp objects. Penetrating trauma involves an object that goes through the skin and into underlying tissues. Open trauma generally refers to any injury that breaks the skin, allowing for exposure to the external environment.

Thus, blunt trauma is appropriately identified as the type occurring without penetration of the body, highlighting its distinction from these other injury classifications.