Table of Contents Author Guidelines Submit a Manuscript
The Scientific World Journal
Volume 2014, Article ID 841879, 6 pages
Research Article

Three-Dimensional Aspects of the Lingual Papillae and Their Connective Tissue Cores in the Tongue of Rats: A Scanning Electron Microscope Study

1Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, Avenida Prof. Dr. Orlando Marques de Paiva n. 87, Cidade Universitária, 05508-270 São Paulo, SP, Brazil
2Departamento de Anatomia, Instituto de Ciências Biomédicas (ICB-III), Avenida Prof. Lineu Prestes n. 2415, Cidade Universitária, Butantã, 05508-900 São Paulo, SP, Brazil
3Laboratório de Morfologia e Atividade Física, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Avenida 24 A n. 1515, Bela Vista, 13506-900 Rio Claro, SP, Brazil

Received 30 July 2014; Accepted 15 October 2014; Published 10 November 2014

Academic Editor: Romeu Rodrigues de Souza

Copyright © 2014 Gabriela de Souza Reginato et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of the present study was to describe the tridimensional morphological characteristics of the lingual papillae and their connective tissue cores (CTCs) in Sprague Dawley rats. Four types of papillae were reported on the dorsal surface. Filiform papillae were distributed on the tongue surface and after epithelial maceration a conic and multifilamentary shape of the CTCs was revealed. Fungiform papillae were reported on the rostral and middle regions covered by a squamous epithelium. After the removal of the epithelium, the shape of a volcano with the taste orifice at its top was noted. Foliate papillae were composed of five pairs of epithelial folds situated on the lateral-caudal margin of the tongue. After the removal of the epithelium, they were shown to be limited by thin laminar projections. The vallate papilla with an oval shape was present in the caudal region and delimited by an incomplete groove. The morphological characteristics of the lingual papillae of Sprague Dowley rats, three-dimensional SEM images, and the types of papillae on the dorsal surface were similar to those reported previously in other rodent mammals. The maceration technique revealed the details of extracellular matrix with varied shapes form of connective tissue cores.