Secondary intention healing involves which of the following characteristics?

Secondary intention healing is characterized by granulation tissue formation that occurs from the bottom up. This type of healing happens when a wound is left open to heal naturally rather than being closed with sutures or staples. In secondary intention healing, the body works to fill the wound with granulation tissue, which is rich in blood vessels and is essential for the healing process. As the granulation tissue matures, it gradually contracts and forms a scar, which is typically more raised and irregular compared to scars formed through primary intention.

Other characteristics often found in secondary intention healing include a longer healing time and a greater potential for complications such as infection because the wound is exposed to the environment. This contrasts with healing by primary intention, where the wound edges are brought together, resulting in cleaner, flatter scars. Therefore, the answer focus is accurately highlighting the process of granulation as a defining feature of secondary intention healing.