All of the following—aside from iliac lymph nodes—are considered superficial lymph nodes.
<h3>What is Lymph Nodes?</h3>
Usually shorter than 2.5 cm, lymph nodes are tiny bean-shaped organs. They are widely dispersed throughout the body along the lymphatic channels, where they filter the lymph before it returns to the blood.
Within the central nervous system, lymph nodes are absent. On each side of the body, there are three areas where the lymph nodes are more likely to collect.
These locations are the inguinal nodes in the groin, axillary nodes in the armpit, and cervical nodes in the neck.
A connective tissue capsule encloses the normal lymph node, which is divided into lymph nodules by this capsule. Lymph sinuses serve as the gaps that divide the dense aggregates of lymphocytes and macrophages that make up lymph nodules. The node's afferent lymphatics, which convey lymph there from the periphery and enter the node on its convex side, are at various points along its perimeter. After passing through the lymph sinuses, the lymph enters an efferent lymphatic channel, which exits the lymph node by way of the hilum, an indentation in the lymph node's surface.
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