Which event refers to the growth of new blood vessels during tissue repair?

Angiogenesis is the process that describes the growth of new blood vessels from pre-existing ones during tissue repair and healing. This process is critical in the inflammatory phase of healing, where an adequate blood supply is essential to deliver oxygen, nutrients, and immune cells to the injured area.

This new vascular network supports the repair process by promoting not only the delivery of required substances for healing but also the removal of waste products from the damaged tissue. Proper angiogenesis helps to ensure that the healing tissue can receive the support it needs to recover effectively and efficiently.

In contrast, wound contracture refers to the process where the edges of a wound draw together, collagen synthesis involves the production of collagen fibers necessary for strengthening and supporting tissue, and epithelialization is the process through which new epithelial cells cover the wound surface. While all these processes are vital in wound healing, angiogenesis is specifically focused on the formation of new blood vessels. Hence, it is the correct answer to the question regarding the growth of new blood vessels during tissue repair.