T. Clark Brelje, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
Robert L. Sorenson, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
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The tongue is covered by a specialized mucosa that contains multiple types of papillae and taste buds. This specimen has excellent examples of foliate papillae and taste buds.
Dermal Papillae - ridges of connective tissue that project into the epithelium that reduce its mobility and brings blood vessels in close contact with the epithelial cells.
Foliate Papillae - parallel ridges on the lateral edges of the tongue separated by deep mucosal furrows (or moats).
Furrows (or Moats) - separate each papillae and receive saliva from the minor lingual glands.
Taste Buds - elliptical structures found in the epithelium of the furrows that contain cells with taste receptors. The circular opening at its apex is the taste pore.
Skeletal Muscle - arranged in three bundles at right angles to each other to allow flexibility and precision in movements of the tongue.
Minor Salivary Glands - found throughout the tongue.
Serous Glands - secrete a fluid that contains digestive enzymes.
Mucous Glands - secrete a fluid that contains mucus (glycoproteins known as mucins).