Final answer:
The final stage of healing, characterized by collagen remodeling and the formation of a pale, flat scar, is called the Maturation phase.
Step-by-step explanation:
The final stage of healing that begins about 3 weeks to 6 months after injury, during which the collagen is remodeled, new collagen tissue is deposited, and the scar becomes a flat, thin, white line is known as the Maturation phase. This phase occurs after the initial stages of inflammation, formation of granulation tissue, and contraction in wound healing. In the Maturation phase, fibroblasts continue to deposit collagen, which is reorganized to increase the tensile strength of the tissue. The newly formed scar tissue initially has a pink or red appearance due to the increased number of blood vessels (angiogenesis), but as the healing progresses, the blood vessels recede, and the scar takes on a paler and flatter appearance.