Inflammatory response
Whenever the skin is broken this triggers the inflammatory response. The inflammatory response is non specific and the blood vessels that are near the are which has been cut dilate. The vessels dilate as a result of histamine being released from the mast cells. The histamine diffuses into the capillaries and they become very preamble this allows phagocytes to squeeze through the blood vessel and reach the cut as quickly as possible as heaps of bacteria have entered into the body. It is important to note that activated proteins called complement proteins and other chemicals attract the phagocytes to this particular area. Hence this is why when you are cut the area it feels warm, appears red, swells up and puss maybe present due to macrophages engulfing bacteria.
Mast cells: When mast cells are injured they release chemicals and a compound called histamine. This then causes swelling, sometimes itching and causes the blood vessels to dilate.
Mast cells: When mast cells are injured they release chemicals and a compound called histamine. This then causes swelling, sometimes itching and causes the blood vessels to dilate.