IMMUNOLOGY

Detailed explanation-1: -Phagocytes are a type of white blood cell that move by amoeboid action. They send out pseudopodia which allows them to surround invading microbes and engulf them. Phagocytes release digestive enzymes which break down the trapped microbes before they can do any harm. This process is called phagocytosis.

Detailed explanation-2: -These disease-fighting cells are made in the bone marrow and are stored in many different places in the body such as the tonsils and adenoids. There are two types of leukocytes: phagocytes and lymphocytes. Phagocytes engulf the intruders, break them down and chew them up.

Detailed explanation-3: -White blood cells: Serving as an army against harmful bacteria and viruses, white blood cells search for, attack and destroy germs to keep you healthy. White blood cells are a key part of your immune system.

Detailed explanation-4: -Like cytotoxic T cells, NK cells destroy virus-infected cells by inducing the infected cell to kill itself by undergoing apoptosis. Unlike T cells, however, NK cells do not express antigen-specific receptors.

Detailed explanation-5: -Cytotoxic T cells kill infected cells, preventing these cells from producing more pathogen.