If you fall and scratch up your elbow while gardening,your elbow will swell from an increase in blood flow to the area.This is a direct result of the:

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Quizplus · Accepted Answer

The swelling of the elbow due to an increase in blood flow to the area after a scratch is a result of the inflammatory response, which includes the secretion of histamine. Histamine increases the permeability of the capillaries to white blood cells and some proteins, to allow them to engage pathogens in the infected tissues.

If You Fall and Scratch Up Your Elbow While Gardening,your