Lymph nodes are part of the body's immune system and play an important role in protecting the body's health. These glands are located throughout the body in connection with a network of veins and arteries called the lymphatic system. The main roles of lymph nodes in the immune system are:

1. Purifier: Lymph nodes play a purifying role in the lymphatic system. By transporting lymph, a clear fluid that flows in the lymphatic system, out of the tissues, they purify bacteria, viruses, and inappropriate substances from the body.

2. Production of immune cells: parts of lymph nodes called topols produce immune cells such as lymphocytes. These cells play an important role in identifying and fighting against microbes, viruses and more dangerous cells that have infiltrated the body.

3. Supporting the immune system: Lymph nodes are present on the level of tissues and organs and have the role of supporting the immune system. As the activity of the immune system increases, these glands also help to grow larger and produce more immune cells.

4. Immune balance: Lymph nodes also play a role in the balance of the immune system. They act as checkpoints in the immune system and regulate the body's immune responses.

In short, lymph nodes play a very important role in the body's immune system and by performing their various tasks, they play an important role in protecting the body against infections and diseases.

Functions of lymph nodes

Lymph nodes play an important role in the body's immune system and perform various tasks in protecting the body's health. Some of the main functions of lymph nodes are:

1. Purification: By maintaining and purifying the lymph fluid that flows in the lymphatic system, the lymph nodes prevent the entry of bacteria, viruses, inappropriate substances and more malignant cells into the tissues. As a result, less contamination and inflammation occurs in the body.

2. Production of immune cells: parts of lymph nodes such as topols produce important immune cells such as lymphocytes (the most specialized immune cells). These cells play a key role in identifying and destroying microbes, viruses and more dangerous cells that have infiltrated the body.

3. Immune system support: Lymph nodes help support the body's immune system by producing and collecting immune cells and other important substances that are necessary for immune function.

4. Immune balance: Lymph nodes act as control points in the body's immune system and make the necessary adjustments for the body's immune reactions. They play a role in controlling the amount of immune cells and their function so that the body responds well to foreign and pathogenic factors.

In general, lymph nodes play a very important role in protecting the body against infections, diseases, and inappropriate substances, and by regulating and performing their immune functions, they maintain the health of the body.