A cellular fragment critical for blood clotting and sealing off wounds.
A large antibody-producing cell that develops from B cells.
Process by which one cell engulfs another cell or large particle.
A large white blood cell that contributes to immune defenses by ingesting microbes or other cells and foreign particles.
A disease-causing organism or virus.
Immunity resulting from the transfer of antibodies or antiserum produced by another person.
A plant or animal that lives, grows, and feeds on or within another living organism.
An individual living thing composed of one or more cells.
A part of the body that has a specific function, such as the lungs.
A white blood cell that is an abundant and important phagocyte.