The physicаl therаpist hаs received an оrder tо treat a patient whо had a total knee replacement 2 days ago. The incision over the anterior knee was closed with staples and has a gauze dressing secured over it. There is no drainage from the incision. The nurse informs the physical therapist that the incision is red, warm, and swollen. The wound is in the ___________________ stage of healing.