Examlex
A country that joins an alliance for protection but provides no military or economic aid to their allies might be considered a free rider.
Macrophages
A type of white blood cell that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells in a process called phagocytosis.
Memory B-Cells
A type of white blood cell involved in the immune response, capable of remembering past infections and pathogens to produce a quicker response upon re-exposure.
B-Lymphocytes
A type of white blood cell that plays a crucial role in the immune system by producing antibodies, which help fight off infections and diseases.
Antigens
Substances that the immune system recognizes as foreign or dangerous, prompting an immune response.
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