PATHOLOGY

Detailed explanation-1: -Any type of major surgery can stress the body and suppress the immune system. The reasons for this aren’t fully understood, but we do know that surgery and the anesthesia medications given to help make you sleep can be hard on the body.

Detailed explanation-2: -Also, infections like the flu virus, mono (mononucleosis), and measles can weaken the immune system for a brief time. Your immune system can also be weakened by smoking, alcohol, and poor nutrition. AIDS.

Detailed explanation-3: -Injury disrupts immune system homeostasis and leads to the development of systemic inflammatory response syndrome (SIRS) and compensatory anti‐inflammatory response syndrome (CARS) in trauma patients.

Detailed explanation-4: -Answer and Explanation: a. Its machinery consists of billions of red blood cells. False, the immune system does not use red blood cells to fight infection.