Lymph nodes are small, bean-shaped organs consisting of countless types of cells, and are a part of the lymphatic system. They are mainly accountable for the regular functioning of the immune system.
Lymph nodes are found in various locations in the body, and operate as filters or trap for foreign particles, as well as to circulate the interstitial fluid called lymph to the body cells and tissues. They have white blood cells that use oxygen to process. Thus, they are significant in the proper functioning of the immune system.
It can be present autonomously or in groups. About 500-600 lymph nodes exist in the human body. Groups of lymph nodes are situated in the neck, the collarbone, the under the arms (armpit) and groin. Lymph nodes are named according to their position in the body. Below is the list of major lymph nodes:
- Axillary lymph nodes - Present in the underarm area. They are divided into two kinds, namely superficial and deep lymph nodes.
- Cervical lymph nodes - These are situated in the head and neck segment. In whole, they are six in number.
- Femoral lymph nodes - These lymph nodes are positioned in the higher thigh portion, along the femoral veins.
- Inguinal lymph nodes - These are situated in the groin region. They may be supercritical or deep lymph nodes.
- Mediastinal lymph nodes - They are flanked by the air sacs of the lungs.
- Mesenteric lymph nodes - These are spread across the lower abdomen.
- Supraclavicular lymph nodes - They are located along the collarbones or clavicle.
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