Combat Medic 68W: Field Craft 1 Practice Exam

Shrapnel and debris are characteristics of secondary blast injuries. These occur as a result of the explosion itself or the subsequent impact from objects that are propelled by the blast. When a bomb detonates, it can generate fragments that can fly at high speeds, causing penetrating wounds or blunt trauma to those nearby.

In contrast, primary blast injuries stem directly from the pressure wave of the explosion and mainly affect air-filled organs such as lungs and ears. Neurological injuries may occur as a consequence of concussive forces but are not specifically due to shrapnel. Tertiary blast injuries result from individuals being thrown by the blast wave into solid objects, which is a different mechanism of injury.

Thus, secondary blast injuries specifically highlight the dangers posed by shrapnel and debris, making this the correct choice in the context of injuries associated with explosive blasts.