IMMUNOLOGY

Detailed explanation-1: -The inflammatory response (inflammation) occurs when tissues are injured by bacteria, trauma, toxins, heat, or any other cause. The damaged cells release chemicals including histamine, bradykinin, and prostaglandins. These chemicals cause blood vessels to leak fluid into the tissues, causing swelling.

Detailed explanation-2: -When your body activates your immune system, it sends out inflammatory cells. These cells attack bacteria or heal damaged tissue. If your body sends out inflammatory cells when you are not sick or injured, you may have chronic inflammation.

Detailed explanation-3: -This type of stimulation–response activity generates some of the most dramatic aspects of inflammation, with large amounts of cytokine production, the activation of many cell types, and in fact the four cardinal signs of inflammation: heat, pain, redness, and swelling (1).

Detailed explanation-4: -Tissue damage due to trauma, microbial invasion, or noxious compounds can induce acute inflammation. It starts rapidly, becomes severe in a short time and symptoms may last for a few days for example cellulitis or acute pneumonia.

Detailed explanation-5: -Inflammation is the response of a body tissue against any harmful pathogen, injury, irritation, or wound. The signs of inflammation are swelling, pain, redness, heat, etc. It is the first step of self-protection provided by the immune system.