Histological structures of tongue and taste buds in some bony fish
1996
Suwanit Promsuttirak | Pipop Promsuttirak (Srinakharinwirot Univ., Bangkok (Thailand). Prasarnmit Campus. Faculty of Science. Dept. of Biology)
Histological structures of the fish tongues in two kinds of bony fishes, scale-fish (Tilapia nilotica) and scaleless-fish (Mystus nemurus) were studied. The cores of these fish tongues are mainly composed of striated muscle fibers lying in various directions. The muscle layers are surrounded by connective tissue with many interlacing fibers and only Mystus has a cartilaginous plate within its tongue. On the dorsal surface of the Tilapia tongue, mucous membrane with numerous mucous cells in the thick epithelium, folds to be high papillae. Between the epithelial and connective tissue layers of the membrane, the melanocyte line is clearly defined. As compared with the Tilapia tongue, papillae on the dorsum of the Mystus tongue are shorter and have no mucous cells. Not any types of glands exist in either of the fisher'tongues. In Tilapia species, drum-shaped taste buds are found at the tips of the papillae on both the tongue and the palate. There are no taste buds on the Mystus tongue but they are found in the epithelium of the palate.
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