What is immunity and the immune system? The human body's ability to fight off harmful germs and infections.
What is immunity and the immune system? The human body's ability to fight off harmful germs and infections. The body's self-defense ability can be defined as its ability to detect and preserve its own particles and the human body. Harmful immunity is the body's ability to fight off harmful germs and infections. The immune system contains special organs, cells and chemicals that help fight infection. These are white blood cells, antibodies, complement system, lymphatic system, spleen, thymus and bone marrow. Organs such as the bone marrow, lymph nodes, spleen and thymus make lymphocytes. Lymphocytes are white blood cells that are further classified into B and T cells. They attack and destroy invading microorganisms or antigens. B cells retaliate by releasing specific antibodies to the antigen, and T cells destroy and kill external invaders and abnormal cells. Humans have three types of immunity. That is: Innova...