The lymph nodes filter the lymph.
The Role of Lymph Nodes
Lymph nodes are essential components of the lymphatic system, acting as filters for the lymph fluid as it circulates throughout the body. According to provided references, these bean-shaped glands, found in areas such as the neck, armpit, and groin, are responsible for filtering out harmful substances.
- Filtering Action: Lymph nodes trap and remove pathogens like viruses, bacteria, and fungi, preventing them from spreading throughout the body.
- Immune Response: Inside the lymph nodes, immune cells such as lymphocytes are present. These cells recognize and attack the trapped pathogens, initiating an immune response to clear the infection.
How Lymph Nodes Filter
The lymph fluid passes through the lymph nodes, where a network of fibers and immune cells filters out debris and pathogens.
- Entry: Lymph enters the lymph node through afferent lymphatic vessels.
- Filtering: As the lymph flows through the node, specialized cells, including macrophages and lymphocytes, capture and destroy foreign particles.
- Exit: Filtered lymph then exits the node through efferent lymphatic vessels, returning to the bloodstream.
Examples of Lymph Node Function
When you have an infection, such as a sore throat, the lymph nodes in your neck may become swollen and tender. This is because the lymph nodes are working hard to filter out the infection and activate an immune response.
