An ____________ happens when cells and fluids in the body react to the presence of a pathogen
Health · High School · Wed Jan 13 2021
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An immune response happens when cells and fluids in the body react to the presence of a pathogen.
The immune system is a complex network of cells, tissues, organs, and the substances they produce that helps the body fight infections and other diseases. Pathogens are anything that can cause a disease, such as viruses, bacteria, fungi, and parasites. When a pathogen enters the body, it is recognized as foreign or non-self, which triggers the immune response.
The immune response can be broken down into two main types: innate (or non-specific) and adaptive (or specific). The innate immune response is the first line of defense and reacts in a general way to pathogens. It includes physical barriers like the skin and mucous membranes, as well as immune cells such as natural killer cells, macrophages, and neutrophils. These cells work to destroy invading pathogens.