Anatomical and histological study of the liver and pancreas of two closely related mountain newts Neurergus microspilotus and N. kaiseri (Amphibia: Caudata: Salamandridae)

Autor: Paria Parto, Mozafar Sharifi, Somaye Vaissi
Jazyk: angličtina
Rok vydání: 2017
Předmět:
0106 biological sciences
0301 basic medicine
Caudata
Neurergus microspilotus
AmphibiaAnimalia
AmphibiaCephalornis
010603 evolutionary biology
01 natural sciences
Digestive glands
Amphibia
03 medical and health sciences
CaudataAnimalia
Gnathostomata
lcsh:Zoology
Parenchyma
medicine
Animalia
Branchiostoma capense
Salamandroidea
Neurergus microspilotusAnimalia
Urupia
lcsh:QL1-991
Chordata
Periodic acid-Schiff (PAS)
Vertebrata
Lissamphibia
Craniata
biology
Ymeria
Simple cuboidal epithelium
Hematoxylin-Eosin
SalamandridaeCephalornis
Anatomy
Salamandridae
Zymogen granule
biology.organism_classification
CaudataCephalornis
Neurergus kaiseri
Basophilic
Neurergus
Periodic acid–Schiff (PAS)
030104 developmental biology
medicine.anatomical_structure
Animal Science and Zoology
Tunica
Pancreas
light microscopy
Zdroj: Zoologia 34: 1-8
Zoologia (Curitiba) v.34 2017
Zoologia (Curitiba. Online)
Sociedade Brasileira de Zoologia
instacron:SBZ
Zoologia (Curitiba), Volume: 34, Article number: e13229, Published: 12 JUN 2017
Zoologia (Curitiba), Vol 34, Iss 0 (2017)
ISSN: 1984-4689
DOI: 10.3897/zoologia.34.e13229
Popis: Anatomical and histological examinations were conducted on the digestive glands of two closely related mountain newts, Neurergus microspilotus (Nesterov, 1916) and Neurergus kaiseri Schmidt, 1952. In N. microspilotus and N. kaiseri the major digestive glands comprise a very large liver and a small pancreas. In both species the liver has two distinct lobes, right and left. Histologically, the parenchyma of the liver of both species is contained within a thin capsule of fibroconnective tissue. Glycogen deposits and fat storage often dissolve during the routine histological process and produce considerable histological variability. Sinusoids are lined with endothelial cells forming a very thin epithelial sheet, with discontinuous basement membrane. Bile ducts also occur within the parenchyma of the liver. The ducts are lined by simple cuboidal epithelium. The gall bladder is a storage depot for bile. Its mucosa is thrown into numerous folds. The epithelial lining of the tunica muscularis is arranged circularly. There is a lot of pigmentation in the hepatic parenchyma. The pancreas in N. microspilotus and N. kaiseri is roughly triangular in shape, and lies rather to the dorsal side of the duodenum, between it and the stomach. The exocrine portion of the pancreas consists of clusters of pyramidal cells, which are mostly organized in acini. In both species the cells have a dark basophilic cytoplasm, distinct basal nuclei, and many large eosinophilic zymogen granules containing enzymes responsible for the digestion of proteins, carbohydrates, fats and nucleotides.
Databáze: OpenAIRE
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