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Analysis of the green turtle esophagus Chelonia mydas (Linnaeus, 1758), Testudines, Cheloniidae / Análisis del esófago de la tortuga verde Chelonia mydas (Linnaeus, 1758), Testudines, Cheloniidae
Melo, Luana Félix De; Rodrigues, Ana Clara Bastos; Cabrera, Marisol León; Turquetti, Anaelise de Oliveira Macedo; Ruivo, Lourenço Proença; Azarias, Gabriel Rici; Lopes, Edris Queiroz; Rici, Rose Eli Grassi.
  • Melo, Luana Félix De; University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Anatomy. São Paulo. BR
  • Rodrigues, Ana Clara Bastos; University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Anatomy. São Paulo. BR
  • Cabrera, Marisol León; University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Anatomy. São Paulo. BR
  • Turquetti, Anaelise de Oliveira Macedo; University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Anatomy. São Paulo. BR
  • Ruivo, Lourenço Proença; Federal University of São Carlos. Campus of Buri. BR
  • Azarias, Gabriel Rici; Faculty of Dentistry of the APCD. Dentistry of the Faculty FAOA. Paulista Association of Dentist Surgeon. São Paulo. BR
  • Lopes, Edris Queiroz; University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Anatomy. São Paulo. BR
  • Rici, Rose Eli Grassi; University of São Paulo. Faculty of Veterinary Medicine and Animal Science. Department of Anatomy. São Paulo. BR
Int. j. morphol ; 37(4): 1391-1396, Dec. 2019. graf
Article in English | LILACS | ID: biblio-1040143
ABSTRACT
The esophagus is a muscular tube whose function is to transport food from the mouth to the stomach and basically contain the same layers as the rest of the digestive tract. The morphological knowledge of structures involved in basic physiological processes in organisms is extremely important in the acquisition of ecological and evolutionary knowledge about species. This study produces morphological information proving the structures found in the green turtle's esophagus. The animals were dissected according to the methodology used by Wyneken, allowing analysis of external and internal morphological characteristics of the esophagus. The samples were processed for microscopic analysis by light and scanning electron microscopy. It was observed that the esophagus presents thin and conical dermal papillae facing the stomach throughout the mucosa to the gastroesophageal portion, decreasing its size at the end of its extension, covered by a thick keratin layer on keratinized pavement epithelial tissue. It is concluded that the esophagus of Chelonia mydas is covered by a layer of conical keratinized dermal papillae important to exert the mechanical and protective function of the mucosa of this organ, considering that the feeding of these animals is extremely abrasive, besides serving as protection so that the food does not return.
RESUMEN
El esófago es un tubo muscular cuya función es transportar los alimentos desde la cavidad oral hasta el estómago y, básicamente, contienen las mismas capas que el resto del tracto digestivo. El conocimiento morfológico de las estructuras involucradas en los procesos fisiológicos básicos en los organismos es extremadamente importante en la adquisición de conocimientos ecológicos y evolutivos sobre las especies. Este estudio produce información morfológica que demuestra las estructuras encontradas en el esófago de la tortuga verde. Los animales se disecaron de acuerdo con la metodología utilizada por Wyneken, lo que permitió el análisis de las características morfológicas internas y externas del esófago. Las muestras se procesaron para análisis microscópico mediante microscopía electrónica de barrido y de luz. Se observó que el esófago presenta papilas dérmicas delgadas y cónicas que se enfrentan al estómago a través de la mucosa hasta la porción gastroesofágica, disminuyendo su tamaño al final de su extensión, cubierta por una capa gruesa de queratina sobre el tejido epitelial queratinizado. Se concluye que el esófago de Chelonia mydas está cubierto por una capa de papilas dérmicas queratinizadas cónicas importantes para ejercer la función mecánica y protectora de la mucosa de este órgano, considerando que la alimentación de estos animales es extremadamente abrasiva, además de servir de protección para que la comida no sea devuelta.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Turtles / Esophagus / Keratins Limits: Animals Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2019 Type: Article Affiliation country: Brazil Institution/Affiliation country: Faculty of Dentistry of the APCD/BR / Federal University of São Carlos/BR / University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Turtles / Esophagus / Keratins Limits: Animals Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2019 Type: Article Affiliation country: Brazil Institution/Affiliation country: Faculty of Dentistry of the APCD/BR / Federal University of São Carlos/BR / University of São Paulo/BR