You are a surgeon operating on a broken bone. you find a large area, swollen with blood, that surrounds the break site. what is the swollen area?

The area swells due to haemotoma.

Explanation:

The process is involuntary. The blood vessel and capillaries around the injured part of the body starts leaking blood which contains white blood corpuscles. Blood vessels also swell to facilitate accumulation of blood so that invasion of foreign bodies can be countered.

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