Which of the following is an extrinsic factor that affects wound healing?

Nutrition is an extrinsic factor affecting wound healing because it encompasses the dietary intake and nutritional status of an individual. Proper nutrition provides the essential nutrients required for the repair and regeneration of tissues. Factors such as adequate protein, vitamins (especially A and C), and minerals (such as zinc) are crucial in promoting the healing processes of wounds.

In addition to supporting cellular functions, nutritional status directly influences immune response and the inflammatory process, both of which are vital in healing. A deficiency in these nutrients can lead to delayed healing, increased risk of infection, and poor recovery outcomes. Understanding the importance of nutrition aids healthcare providers in creating effective rehabilitation strategies and developing nutritional plans to optimize wound healing post-surgery.

Other factors like age, circulatory function, and patient comorbidities are typically classified as intrinsic factors, as they originate from the individual's biological or health status rather than external influences.