Arquivos de Medicina Interna Geral


Understanding the complexities of the immune system.

Alexander Rudensky*

Immunology is a branch of biomedical science that deals with the study of the immune system and its response to various pathogens and diseases. The immune system is a complex network of cells, tissues, and organs that work together to protect the body from invading microorganisms and other harmful substances. The immune system has two major components: The innate immune system and the adaptive immune system. The innate immune system is the first line of defense and provides immediate protection against pathogens. It includes physical and chemical barriers such as skin and mucous membranes, as well as cells such as macrophages and neutrophils that can recognize and destroy invading pathogens.