There are numerous maps of the locations of lymph nodes, both in the neck and around the rest of the body, available online. Innerbody.com provides an interactive map on its website, allowing for an in-depth analysis of the lymph nodes and the lymphatic system.
Lymph nodes are small glands that are situated all around the body. These nodes are part of the lymph system, which carries lymph fluid, as well as nutrients and waste, between tissues and the blood stream. Lymph nodes filter this lymph fluid as it passes through the nodes, removing bacteria, viruses and other unwelcome substances. A node can swell when an injury or infection has occurred near it. Afterwards, lymphocytes, a type of white blood cell, destroy these foreign substances.
The lymphatic system around the neck and head include many sets of lymph nodes and vessels, as well as the tonsils. This system works to drain harmful pathogens from around the head and neck. There are five groups of lymph nodes situated in the neck, the most superficial of which can be felt through the skin directly under the jaw. The vessels and nodes in the lymphatic system follow the path of major blood vessels in the neck, including the jugular veins and carotid arteries.