Immune response that operates at the cellular level, involving T lymphocytes from the thymus gland

The body's surveillance system that determines "self" from foreign substances

Immune cells designed to recognise and lyse viral infections or cancer cells

Immune response mediated by B lymphocytes, providing protection against bacteria and neutralising toxins

Crucial lymphocytes that enhance the functioning of cytotoxic T cells, B cells, and macrophages

The body's fast, broad defence providing general protection against a variety of pathogens

A slower, more targeted immune process involving lymphocytes with specific antigen receptors