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3 days ago · Immune system, the complex group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing entities. Immunity from disease is conferred by two cooperative defense systems: innate immunity and acquired immunity. Learn more about the immune system’s mechanisms and evolution.
Overview of the Immune System. video. The immune system is designed to defend the body against foreign or dangerous invaders. Such invaders include. Microorganisms (commonly called germs, such as bacteria, viruses, and fungi) Parasites (such as worms) Cancer cells. Transplanted organs and tissues.
The immune system is made up of different organs, cells, and proteins that work together. There are 2 main parts of the immune system: The innate immune system. You are born with this. The adaptive immune system. You develop this when your body is exposed to microbes or chemicals released by microbes. These 2 immune systems work together. The ...
The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Antibodies attach to an antigen and attract cells that will engulf and destroy the pathogen.
Jun 6, 2023 · Last Update: June 6, 2023; Next update: 2026. The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins.
The immune system is your body's defense system. It helps protect you from illness and infection. The immune system's job is to attack things that don’t belong in your body, including: Germs, such as bacteria, viruses, and fungi. Parasites. Cancer cells. Other things that can get inside your body, such as pollen. Overview of the Immune System.
The immune system is complex and pervasive. There are numerous cell types that either circulate throughout the body or reside in a particular tissue. Each cell type plays a unique role, with different ways of recognizing problems, communicating with other cells, and performing their functions.
