Macroscopic and microscopic morphology of the trachea and lungs of giant anteater (Myrmecophaga tridactyla)
| Autor: | Ana Paula Iglesias Santin, Veridiana Maria Brianezi Dignani de Moura, Evelyn de Oliveira, Júlio C. Roquete, Jair M. Santiago Neto, Eduardo de Paula Nascente, Leiny Paula de Oliveira |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Morphology
anatomy 040301 veterinary sciences Veterinary medicine trachea 0403 veterinary science histology Xenarthras Trichrome SF600-1100 Parenchyma wild animals medicine Giant anteater Myrmecophaga tridactyla Microscopic morphology lungs Lung General Veterinary biology giant anteater 0402 animal and dairy science Histology 04 agricultural and veterinary sciences Anatomy respiratory system biology.organism_classification respiratory tract 040201 dairy & animal science medicine.anatomical_structure Respiratory epithelium Respiratory tract |
| Zdroj: | Pesquisa Veterinária Brasileira v.40 n.12 2020 Pesquisa Veterinária Brasileira Colégio Brasileiro de Patologia Animal (CBPA) instacron:EMBRAPA Pesquisa Veterinária Brasileira, Vol 40, Iss 12, Pp 1054-1062 (2021) |
| Popis: | Giant anteater (Myrmecophaga tridactyla) is a wild mammal distributed in Central and South America; nowadays, it is classified as an endangered species. Research about the macroscopic and histomorphological aspects of its respiratory tract is scarce, and, sometimes, it limits the treatment provided to sick animals and impairs species preservation. Thus, the present study aims to describe the macroscopic and microscopic morphology of its lower respiratory tract, including trachea and lungs. To do so, 12 adult giant anteaters from “Centro de Triagem de Animais Silvestres de Goiânia” (CETAS-GO), Goiás State, Brazil, were used in the research after natural death or euthanasia. Three of these animals were used for macroscopic assessments; they were fixed in 10% buffered formalin and dissected. Trachea and lung tissue samples were collected from nine animals right after death and fixed in 10% buffered formalin for histomorphological analysis; they were processed, embedded in paraffin, and inked with hematoxylin-eosin (HE), periodic acid-Schiff (PAS), and Masson’s trichrome. The macroscopic analysis showed that the trachea in this species is proportionally short and presents from 19 to 27 tracheal cartilages. The right lung presents four lobes and the left one, two. The microscopic analysis evidenced respiratory epithelium of the ciliated cylindrical pseudostratified type, without evident goblet cells in the mucosa layer of the trachea and bronchi. The pulmonary visceral pleura is thick, similar to other large domestic mammals - complete septa extend from the pulmonary visceral pleura. In conclusion, the macroscopy and histomorphology of giant anteater’s lower respiratory tract, represented by trachea and lungs, are similar to that of other domestic and wild mammals. Pulmonary histomorphology is mainly similar to that of pigs and ruminants: it has thick visceral pleura that emits complete septa of conjunctive tissue, which enable lobular parenchymal architecture. |
| Databáze: | OpenAIRE |
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