<prompt> Dermis involved in theFirst degree burnsSecond degree burnsThird degree burnsFouh degree burns  <response>: Third degree Full thickness burn Involve all layers of dermis Characterized by hard leathery eschar, that is painless and black, white or cherry red No capillary refilling or pin-prick sensation All dermal and epidermal components are lost Heals only by wound contractures Require excision with skin grafting to heal Ref: Sabiston 20th edition Pgno :506-507 