ANATOMY

Detailed explanation-1: -There are several types of white blood cells and they have different roles in defending the body against bacterial, viral, fungal and parasitic infections. When they locate an infection, these cells move to the site under attack to destroy the invading pathogen and prevent illness. Some directly fight intruders.

Detailed explanation-2: -They seek out, ingest, and destroy pathogens and other debris through a process called phagocytosis. Typically, phagocytosis is initiated when receptors on the immune cell surface bind to ligands which have coated a pathogen particle.

Detailed explanation-3: -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-4: -Producing antibodies. Producing antigens. Engulfing pathogens.