<prompt> Burns involving skin superficial pa of dermis is categorized asFirst degree burnsSuperficial 2nd degree burnDeep 2nd degree burnThird degree burns  <response>: First degree burns involve only epidermis Superficial second degree involve upper layer of dermis Deep second degree involves reticular layers of dermis Third degree involves all layers of skin Fouh degree burns involve not only skin but also subcutaneous fat and deeper structures 