What does your immune system do?

The immune system is a complex network of cells, tissues, and organs that work together to protect the body from infection. It does this by recognizing and destroying harmful microorganisms, such as bacteria, viruses, and fungi. The immune system also helps to protect the body from its own cells that have become damaged or abnormal, such as cancer cells.

The immune system is made up of many different types of cells, including:

* White blood cells: White blood cells are the main cells of the immune system. They are found in the blood, bone marrow, and lymphatic system. There are many different types of white blood cells, each with a specific role in the immune response.

* T cells: T cells are white blood cells that help to kill infected cells and cancer cells.

* B cells: B cells are white blood cells that produce antibodies. Antibodies are proteins that bind to and neutralize harmful microorganisms.

* Natural killer (NK) cells: NK cells are white blood cells that kill infected cells and cancer cells without first needing to recognize them.

* Macrophages: Macrophages are large, white blood cells that engulf and destroy harmful microorganisms and other foreign particles.

* Dendritic cells: Dendritic cells are white blood cells that capture and present harmful microorganisms to other immune cells.

The immune system is also closely linked to the lymphatic system. The lymphatic system is a network of tissues and organs that helps to filter and circulate lymph fluid throughout the body. Lymph fluid contains white blood cells and other immune cells that help to protect the body from infection.

The immune system is a powerful and complex system that is essential for the body's ability to stay healthy. By recognizing and destroying harmful microorganisms, the immune system helps to protect the body from infection and disease.