The inflammatory response (inflammation) can be described as a localized response to an injury or to the destruction of tissues. It occurs when tissues are injured by bacteria, trauma, toxins, heat, or any other cause. The cells in damaged tissue release chemicals that can cause swelling, redness, heat, pain in the damaged area, all as part of the healing process. Some of those chemicals are cytokines that bring in body's immune cells. Others are histamine and prostaglandins which cause swelling, pain and fever. As the body heals, the inflammation gradually decreases.
The mass of an object is a measure of the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. Mass does not change with gravity as weight does due to the act of pulling down on an object making it in fact heavier.
