Swelling in tissues???

Question

when we get hurt the tissues near the infected area get swollen and red .can any one give me the reason for this??

pls give it in detail.thanks in advance

Answer 1

Inflammation - due to the infiltration of the tissues by plasma and leukocytes.The increased flow of fluid into the tissue causes the characteristic swelling associated with inflammation since the lymphatic system doesn't have the capacity to compensate for it, and the increased blood flow to the area causes the reddened colour and increased heat. The blood vessels also alter to permit the extravasation of leukocytes through the endothelium and basement membrane constituting the blood vessel. Once in the tissue, the cells migrate along a chemotactic gradient to reach the site of injury, where they can attempt to remove the stimulus and repair the tissue.

http://en.wikipedia.org/wiki/Inflammatio...