Your immune system is a large network of organs, white blood cells, proteins (antibodies) and chemicals. This system works together to protect you from foreign invaders (bacteria, viruses, parasites, and fungi) that cause infection, illness and disease.22 Feb 2020
What makes the immune system different from other body systems?
The immune system is like a police force. It patrols everywhere, and if it finds a disturbance, it calls for back-up. In this way, it is different from other systems in that it has to be able to react in any part of the body. The immune system provides two levels of defense: innate and adaptive immunity.22 Apr 2019
What are all the organs in the immune system?
The key primary lymphoid organs of the immune system are the thymus and bone marrow, and secondary lymphatic tissues such as spleen, tonsils, lymph vessels, lymph nodes, adenoids, and skin and liver.3 Jan 2021
How is the immune system classified?
The immune system can be classified into two subsystems: the innate and adaptive immune systems. In general, innate immunity is considered a nonspecific response, whereas the adaptive immune system is thought of as being very specific.1 Feb 2005
Is the immune system a functional system?
The specific immune system functions as a second line of defense against invading pathogenic agents that may take several days or longer due to the immunologic response.
Why is the immune system a system?
The immune system protects your child's body from outside invaders. These include germs such as bacteria, viruses, and fungi, and toxins (chemicals made by microbes). The immune system is made up of different organs, cells, and proteins that work together.