Final answer:
Collagen for repairing deep skin wounds is produced by dermal fibroblasts (option C), which are essential for wound healing and scar formation.
Step-by-step explanation:
Collagen to repair a deep skin wound is produced by dermal fibroblasts. These cells are crucial in the wound healing process. They mobilize and divide rapidly to repair the damaged tissue by depositing collagen, which forms granulation tissue. This repair process also includes the development of new blood capillaries, following the fibroblasts, to help increase blood circulation and oxygen supply to the affected area. The immune cells, such as macrophages, play a role in reducing the chance of infection by engulfing any foreign matter that enters the wound.
During the inflammatory phase of wound repair, fibroblasts lay down collagen fibers in a basket-weave pattern which ultimately leads to scar formation if the original skin structure is not fully regenerated. This collagen-rich tissue differs from normal skin as it is fibrous in nature and does not allow for the regeneration of accessory structures, such as hair follicles, sweat glands, or sebaceous glands.