IMMUNOLOGY

Detailed explanation-1: -Spleen. The spleen is a blood-filtering organ that removes microbes and destroys old or damaged red blood cells. It also makes disease-fighting components of the immune system (including antibodies and lymphocytes).

Detailed explanation-2: -Cytotoxic T Lymphocytes The cell-mediated part of the adaptive immune system consists of CTLs that attack and destroy infected cells.

Detailed explanation-3: -Bone marrow That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells.