PATHOLOGY

Detailed explanation-1: -The body always responds to an injury with a predictable inflammatory response, as the first step towards healing. Redness, heat, swelling and pain are associated with this first stage. Redness and heat are caused by increased blood flow.

Detailed explanation-2: -The inflammatory response increases the amount of blood flow to the site of injury to get more nutrients and white blood cells to an area in need. To increase blood flow to the area, the blood vessels get wider (dilate).

Detailed explanation-3: -Acute inflammation is the body’s initial response when you have an injury or illness – think of the redness and swelling you see when you get a cut or splinter. The redness you might see around an injury is caused by increased blood flow.

Detailed explanation-4: -During acute inflammatory responses, leukocyte-derived mediators such histamine and bradykinin will cause arteriolar dilation thereby increasing blood flow leading to rubor.