Estudo histológico e comparativo das papilas linguais dos cervídeos Mazama americana e Mazama gouzoubira por microscopia de luz e eletrônica de varredura

Abstract

RESUMO.-O tipo de alimentação depende do ambiente em que o animal se encontra, sendo este um fator responsável pela alteração da morfologia, como a estratiϐicação e o nível de queratinização da língua, e a funcionalidade da mesma. Dentre as estruturas morfológicas funcionais da língua, as papilas vêm merecendo destaque devido a sua estreita relação com a dieta. Foram utilizadas duas espécies de cervídeos: cinco Mazama gouazoubira e duas Mazama americana, dividindo-se a língua em três partes: ápice, corpo e raiz. Analisou comparativamente a língua de duas espécies por meio de microscopia de The type of feeding is dependent on the environment in which the animal lives, fact that's responsible for changes in morphology such as stratiϐication, level of keratinization and functionality. Among the functional morphological structures of the tongue the papillae are worth mentioning due to their close relation to the diet. Two Cervidae species were used, ϐive Mazama gouazoubira and two Mazama americana. Their tongues were divided into three parts, apex, body and root, and comparatively analyzed by light and scanning electron microscopy. The ϐiliform, fungiform and vallate papillae were present in the two species' tongue and presented the same distribution, differing only in the quantity of vallate papillae on the root of the tongue, fact that might be related to the diet. Moreover, their distribution resembles that of other herbivore species.

Quantification and distribution of circumvallate lingual papillae in saanen goats

“…The tongue surface showed papillae distributed throughout the side surface of the tongue root, at the tongue torus region, with differences in the amount and distribution, differing in distribution in each side of the dorsal caudal part, as reported in literature by Sisson and Grossman (2012). The presence and distribution of circumvallate papillae in most tongues of 26 Saanen goats studied was similar to of Mazama americana deer (KOKUBUN et al, 2012). Studies performed by Fonseca et al (2011) with goats of the same breed and of Mazama americana deer (KOKUBUN et al, 2012).…”

“…The presence and distribution of circumvallate papillae in most tongues of 26 Saanen goats studied was similar to of Mazama americana deer (KOKUBUN et al, 2012). Studies performed by Fonseca et al (2011) with goats of the same breed and of Mazama americana deer (KOKUBUN et al, 2012). As in Saanen goats, boars of the Sus scrofa species have similarly arranged grooved papillae, being arranged only in the caudal region of the tongue dorsum (REGINATO, 2015).…”

“…It is located on the mouth floor between the jaw branches and has the function of capturing and handling food and water, swallowing, hygiene and also acts as a sensory organ, being primarily composed of skeletal muscle (KÖNIG;LIEBICH, 2011;SISSON;GROSSMAN, 2012). Tongue may vary in shape, size and functionality, presenting such morphological diversity under strong influence of dietary habits (DORAN, 1975;DYCE et al, 2010;FONSECA et al, 2011;KOKUBUN et al, 2012).…”

Morphofunctional structure of the lingual papillae in three species of South American Camelids: Alpaca, guanaco, and llama

“…A similar formation (two sharply pointed projections) was observed in some filiform papillae of the dorsal surface of guanaco tongue. Moreover, the superficial layer of epithelium of filiform papillae in SAC species consisted of scale‐like, cornified and flattened cells as reported in cattle (de Paz Cabello et al, ), chital deer (Erdoğan and Pérez, ), pampas deer (Erdoğan and Pérez, ), alpaca (Goździewska‐Harłajczuk et al, ), and mazama species (Kokubun et al, ). These differences in formations and topographical distributions of filiform papillae among mammal species appear to be related to age, food, and feeding and mastication pattern (Erdunchaolu et al, ).…”

Morphology of the lingual papillae of Egyptian buffalo (Bubalus bubalis)

“…The lenticular papillae were restricted to the lingual prominence, similar to other ruminants, roan antelope, and sitatunga (Emura et al, 2011a,b). There are no lenticular papillae in the lingual prominence of reeves filiform papillae, barking deer, or mazama species (Zheng and Kobayashi, 2006;Adnyane et al, 2011;Kokubun et al, 2012). The conical and lenticular papillae aid mastication and the movement of food inside the buccal cavity and may be related to the need for physical mastication of plant material.…”