ANATOMY

Detailed explanation-1: -(b) Histamine increases blood flow to the wound site, and increased vascular permeability allows fluid, proteins, phagocytes, and other immune cells to enter infected tissue. These events result in the swelling and reddening of the injured site, and the increased blood flow to the injured site causes it to feel warm.

Detailed explanation-2: -Redness and heat are caused by increased blood flow. Swelling is the result of the increased movement of fluid and white blood cells into the injured area. The release of chemicals and the compression of nerves in the area of injury cause pain.

Detailed explanation-3: -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-4: -Causes of an inflammation Pathogens (germs) like bacteria, viruses or fungi. External injuries like scrapes or damage through foreign objects (for example a thorn in your finger) Effects of chemicals or radiation.

Detailed explanation-5: -When the inflammation process starts, chemicals in white blood cells are released into the blood and the affected tissues to protect the body. The chemicals increase blood flow to the infected or injured body areas, causing redness and warmth.