Final answer:
The adenoids, palatine tonsils, and lingual tonsils are actual tonsil tissues, while the palatoglossal tonsils are not, as they do not exist. The palatoglossal arch is muscle tissue, not tonsil or lymphoid tissue.
Step-by-step explanation:
The question asks which items in the list are not considered tonsils. Tonsils are lymphoid nodules that are found in various locations within the throat and behind the nasal cavity and are part of the body’s lymphatic system. Specifically, the adenoids (pharyngeal tonsils), the palatine tonsils, and the lingual tonsils are named for their respective locations in the throat and contribute to the immune response.
The palatoglossal tonsils fall outside of this classification because they are not a form of tonsil tissue. Instead, the correct term related to the tonsils here is the palatoglossal arch, which is a muscle and not lymphoid tissue. The mucosa-associated lymphoid tissue (MALT) encompasses the different sets of tonsils (pharyngeal, palatine, and lingual) as well as other lymphoid tissues like Peyer's patches in the small intestine and bronchus-associated lymphoid tissue (BALT) in the respiratory tract, but it is not itself a tonsil.