What is lymph nodes?

Lymph nodes, also known as lymph glands, are small, round organs that are part of the lymphatic system. They act as filters for the body, helping to remove waste products and harmful substances from the blood and tissues. Lymph nodes are found throughout the body, but they are particularly concentrated in the neck, armpits, and groin.

Lymph nodes are made up of different types of immune cells, including lymphocytes, macrophages, and dendritic cells. These cells work together to identify and destroy foreign substances, such as bacteria, viruses, and cancer cells. When these cells detect a foreign substance, they can multiply and produce antibodies, which are proteins that help to destroy the substance.

Lymph nodes also play an important role in the body's immune response. When a foreign substance is detected, the lymph nodes can swell and become tender, which is a sign that the body is fighting an infection. In some cases, lymph nodes may also become enlarged or hard, which can indicate a more serious medical condition, such as cancer.

Lymph nodes are an important part of the body's immune system and play a vital role in protecting the body from infection and disease.