IMMUNOLOGY

Detailed explanation-1: -White blood cells are part of the body’s immune system. They help the body fight infection and other diseases. Types of white blood cells are granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes (T cells and B cells).

Detailed explanation-2: -Immune cells are sometimes called white blood cells or leukocytes. Granulocytes are a type of leukocyte that contain granules in their cytoplasm containing enzymes. Neutrophils, basophils and eosinophils are types of granulocytes.

Detailed explanation-3: -White blood cells include lymphocytes (such as B-cells, T-cells and natural killer cells), and many other types of immune cells.

Detailed explanation-4: -In the US, this is usually expressed as 4, 000 to 11, 000 white blood cells per microliter of blood. White blood cells make up approximately 1% of the total blood volume in a healthy adult, making them substantially less numerous than the red blood cells at 40% to 45%.