What is the body's response to injury or infection called?

The body's response to injury or infection is referred to as inflammation. This complex biological process involves the activation of the immune system and the mobilization of various immune cells to the site of injury or infection. Inflammation serves several crucial functions, including isolating and clearing pathogens, facilitating tissue repair, and initiating the healing process.

When tissue is damaged or an invader like bacteria is detected, various signaling molecules, such as cytokines, are released. This leads to increased blood flow to the area, allowing more immune cells to reach the affected site. Accompanying this response are classical signs of inflammation, including swelling, redness, heat, and pain.

While fever, swelling, and redness can be associated with inflammation and are part of the broader inflammatory response, inflammation encompasses a wider array of cellular and molecular responses. Thus, inflammation accurately describes the overall systemic response initiated by the body to combat injury or infection.