What is Lymph Node?

Overview

Lymph nodes are small, oval-shaped organs found throughout the body, particularly in areas like the neck, armpits, and groin. They are a crucial part of the lymphatic system, which is responsible for transporting lymph, a fluid that contains infection-fighting white blood cells. When the body is fighting an infection, lymph nodes can become swollen as they produce more immune cells to combat the threat, which is why you might notice swollen glands when you're sick. Each lymph node acts as a filter, trapping bacteria, viruses, and other foreign substances that can cause illness. The lymph fluid flows through these nodes, where immune cells can recognize and respond to pathogens. For example, if you get a cut and bacteria enter your body, nearby lymph nodes will work to identify and eliminate the bacteria, helping to prevent infection from spreading. Understanding lymph nodes is important because they play a key role in our immune response. When doctors check for swollen lymph nodes during a physical exam, they are often looking for signs of infection or other health issues, such as cancer. This makes lymph nodes a vital indicator of overall health and a focus for medical evaluation.