Ask the Doctor

What is a lymph node

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I have heard a lot about Lymph nodes. It will be appreciated if you can help me to clarify the topic.

Steve (by SMS)

 

Lymph nodes are located throughout the body. They are small, bean-shaped glands that play a crucial role in the immune system. During an infection, a person may notice swollen lymph nodes. The body contains hundreds of lymph nodes. They form clusters around the body and are particularly prominent in areas such as the neck, armpit and groin and behind the ears. They filter lymphatic fluid, which helps rid the body of germs and remove waste products.

The body’s cells and tissues dispose of waste products in lymphatic fluid, which lymph nodes then filter. During this process, they catch bacteria and viruses that could harm the rest of the body. Lymph nodes are an essential part of the body’s immune system. Due to their function, they come into contact with toxins, which can cause them to swell. Although swollen lymph nodes are common, they may occasionally indicate lymph node cancer, or lymphoma. Lymph nodes are part of the lymphatic system, which is a complex network of nodes and vessels. In certain areas of the body, such as the neck, armpit, and groin, lymph nodes sit close to the skin. This means a person may feel them swell when an infection develops. Lymph nodes form clusters throughout the body. Their main function is to filter out potentially harmful substances.

All tissues and cells in the body excrete lymphatic fluid, or lymph, in order to eliminate waste products. The lymph then travels through vessels in the lymphatic system and passes through lymph nodes for filtering. Lymph nodes contain lymphocytes. These are a type of white blood cells that help destroy pathogens, such as bacteria, viruses, and fungi.

When lymph nodes detect a pathogen in the lymph, they produce more lymphocytes, which causes them to swell. Upon encountering bacteria or damaged cells, lymph nodes destroy them and turn them into a waste product. When the lymph reenters the bloodstream, waste products travel to the kidneys and liver. The body then excretes waste products in the urine and feces.

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