Your immune system is a large network of organs, white blood cells, proteins and chemicals. These parts all work together to protect you from germs and other invaders.

The immune system works to keep germs and other foreign substances out of the body and destroy any that get in. It's made up of a complicated network of cells and organs.

Discover the complex network of cells, tissues, and organs that make up your immune system and learn how they work together to protect your health.

Nov 29, 2025 · The immune system is a group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing entities. Immunity from disease is conferred …

It detects and responds to a wide variety of pathogens, such as viruses, bacteria, and parasites, as well as cancer cells and objects, such as wood splinters —distinguishing them from the organism's own …

Mar 11, 2025 · Its complex network of cells, organs, proteins, and tissues enables the immune system to defend the body from pathogens. A fully functional immune system can distinguish healthy tissue from...

Feb 3, 2025 · Most of your white blood cells form in your bone marrow, but two other types -- T cells and B cells -- are made in your lymph nodes and spleen. Your body has five different types of white blood...

The immune system is made up of a complex network of organs, cells and proteins that fight infection (microbes). The immune system keeps a record of every microbe it has ever defeated, in types of …

What is the immune system? Your immune system defends your body from infection. It is made up of a complex network of cells, chemicals, tissues and organs. An underactive or overactive immune …

What are the main parts of the immune system? The important parts of your immune system include: White blood cells (leukocytes) travel through your blood to find and fight germs and other problems. …