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 | Don't forget that the region of the back wall of the nasal cavity is known as the nasopharynx. The pharyngeal tonsil is commonly called the adenoid. | |
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| The last kind of tonsil, the lingual tonsils are located on the back of the tongue. | |
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| The spleen is a large lymphatic organ containing venous sinuses. | |
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| It filters and cleanses the blood. | |
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| It also destroys pathogens carried by the blood and contains reservoir of blood. | |
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| It has one more function: it is the primary site for removal of old RBCs. | |
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