What are the two types of tissue repair?

• A. Regeneration and necrosis
• B. Scar formation and inflammation
• C. Regeneration and repair via scar formation
• D. Proliferation and maturation

Answer: (C)

Tissue repair can be primarily categorized into two processes: regeneration and repair via scar formation. Regeneration refers to the process where damaged tissues are replaced with the same type of cells, restoring the original structure and function of the tissue. This is particularly evident in tissues that have strong regenerative capacities, such as the liver or skin under certain conditions.

On the other hand, repair via scar formation occurs when regeneration is not possible due to extensive damage or the nature of the tissue. In this process, the body creates granulation tissue, which eventually matures into a scar made of collagen. This scar tissue may not fully restore the original function and architecture of the tissue but serves to stabilize the area.

The other options do not accurately describe the main classifications of tissue repair. For example, necrosis and inflammation are terms related to tissue damage and the body’s response rather than methods of healing. Proliferation and maturation are stages within the broader process of repair but do not specifically categorize the types of repair mechanisms. Hence, the distinction between regeneration and repair via scar formation provides a clear framework to understand how tissues respond to injury and the outcomes of healing.