Produção Nacional
Revisado por pares
Histology and Immunohistochemistry of the Cardiac Ventricular Structure in the Green Turtle (Chelonia mydas)
2015; Wiley; Volume: 45; Issue: 4 Linguagem: Inglês
10.1111/ahe.12195
ISSN1439-0264
AutoresJanine Karla França da Silva Braz, Maria Luiza Pontes de França Freitas, Marcela dos Santos Magalhães, Moacir Franco de Oliveira, Miriam S.M.O. Costa, N. S. Resende, Naianne Kelly Clébis, N. B. Silva, Carlos Eduardo Bezerra de Moura,
Tópico(s)Coronary Artery Anomalies
ResumoThis study describes the implications of cardiac ventricular microscopy in Chelonia mydas relating to its ability to dive. For this work, 11 specimens of the marine turtle species C. mydas found dead on the coast of Rio Grande do Norte (Northeast Brazil) were used. After necropsy, fragments of the cardiac ventricular wall were fixed in 10% buffered formaldehyde solution for 24 h and then subjected to routine processing for light and scanning electron microscopy (SEM). The ventricle in this species is formed by the epicardium, myocardium and endocardium. The subepicardial layer consists of highly vascularised connective tissue that emits septa to reinforce the myocardium surface. There is an abundant and diffuse subepicardial nerve plexus shown by immunostaining technique. The thickness of the spongy myocardium and the nature of its trabeculae varied between the heart chambers. The endocardium shows no characteristic elements of the heart conduction system. The valves have a hyaline cartilage skeleton, coated by dense irregular connective tissues characterised by elastic fibres. These findings in the green turtle ventricular microscopy are related to hypoxia resistance during diving.
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