Leukocytes and Platelets

Definition

Leukocytes, also known as white blood cells, are a type of blood cell primarily involved in the body's immune response to identify and combat infections, diseases, and foreign invaders. They vary in function and appearance, playing critical roles from producing antibodies to directly attacking pathogens.

Related terms

Immune system: The complex network of cells, tissues, and organs that work together to defend the body against attacks by foreign invaders.

Antibody: A protein produced by B cells (a type of leukocyte) that specifically targets and helps eliminate foreign antigens such as bacteria and viruses.

Pathogen: Any organism or substance capable of causing disease, which leukocytes help to defend against.