Tonsil
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Image:Tonsils diagram.jpg Image:Tonsilitis.jpg The tonsils are areas of lymphoid tissue on either side of the throat. An infection of the tonsils is called tonsillitis.
As with other organs of the lymphatic system, the tonsils act as part of the immune system to help protect against infection. In particular, they are believed to be involved in helping fight off pharyngeal and upper respiratory tract infections.
Tonsils in humans[1] include, from superior to inferior: pharyngeal tonsils (also known as adenoids), tubal tonsils, palatine tonsils, and lingual tonsils. Together this set of lymphatic tissue is called the tonsillar ring or Waldeyer's ring. Tonsils tend to reach their largest size near puberty, and they gradually undergo atrophy thereafter. However, they are largest relative to the diameter of the throat in young children, and tonsillectomy may be indicated if they are obstructing the airway or interfering with swallowing.
Most commonly, the term "tonsils" refers to the palatine tonsils that can be seen in the back of the throat.
Tonsillitis is an inflammation the tonsils and will often, but not necessarily, cause a sore throat and fever.
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Lymph nodes - Lymph - Lymphocytes - Lymph vessels - Thoracic duct - Immune system - Bone marrow - Spleen - Thymus - Tonsils |
