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| Muriana,C. B; Vasconcelos,B. V; Leandro,R. M; Malavasi,C. E; Amorim,A. F; Rici,R. E. G; Maria,D. A; Miglino,M. A; Ferreira,A.O. |
| The hammerhead sharks shows a head laterally expanded with eyes and nostrils on the edges, which gives the species a hammer appearance. Another strand of studies indicates that the hypothesis of head shape alterations for better adaptions in the sensorial system with the development of structures associated to binocular sight and others sensorial organs. Given the variety of characteristics, the study aim was to describe the anatomical constitution of the hammerhead shark eye bulb. The bulb and its annexes exenteration was performed, and further dissection; the morphological description of the muscle insertions and eye bulb components were based on direct observation and were further photographed and catalogued. The eye bulb fragments and its annexes were... |
| Tipo: Journal article |
Palavras-chave: Cartilaginous fish; Chondrichthyes; Vision; Microscopy; Morphology. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100045 |
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| Rangel,Bianca S.; Bruno,Carlos E. Malavasi; Salmon,Thierry; Ciena,Adriano P.; Miglino,Maria A.; Amorim,Alberto F.; Rici,Rose E. G.. |
| ABSTRACT Oviducal gland present in elasmobranchs is correlated to the organism's reproductive strategy, and its functions are to produce mucus, to form the egg's tertiary envelope and to store sperm. The gland contains four zones: club, papillary,baffle and terminal. The structures of the oviduct, oviducal gland and isthmus of blue shark Prionace glauca were described using macroscopic, light microscopy and scanning electron microscopy techniques. The epithelium of the oviduct and isthmus is folded and is a simple, columnar, ciliated lining epithelium with glandular cells. In the oviducal gland, the lining tissues in the four zones are similar to the oviduct and isthmus lining. The terminal zone shows the presence of sperm in the lumen of the secretory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cartilaginous fish; Electron microscopy; Nidamental gland; Reproduction; Shell gland. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400663 |
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