Phagocytes remove pathogens and dead body cells. There are two main types: neutrophills and macrophages.

Neutrophils:
Are made in bone marrow throughout life.
Make up 60% of white blood cells.
Travel through the blood.
Are short lived.
Squeeze through capillary walls to patrol tissue.
Have a lobed nucleus.
Released in large numbers during infection.
Dead neutrophils make pus.

Macrophages:
Are made out in bone marrow throughout life.
Leave bone marrow and travel in blood as monocytes.
Are longer lived than neutrophils.
Are found in organs such as: Lungs, liver, kidney, spleen, lymph nodes.
Have a lobed nucleus.
Are larger than neutrophils.
Cut up pathogens to display antigens which are recognised by lymphocytes.