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We investigated the cytoarchitecture and surface ultrastructural characteristics of different cells lining the epithelium of the saccus vasculosus of Notopterus chitala (Hamilton, 1822). The saccus vasculosus, the richly vascularized reddish, sac like organ is situated on the ventral aspect of the diencephalon just behind the pituitary gland. Histologically, the saccus vasculosus consisted of several loculi lined with a heterogeneous population of a large number of specialized coronet cells and a smaller number of alternately arranged supporting cells. The loculi were densely surrounded by blood sinusoids. The loculi opened into several collecting channels that united and ultimately drained into the third ventricle of the brain. The coronet cells possessed central or basal nuclei and an apical globular protrusion. Under scanning electron microscopy, the coronet cells were variable in shape with prominent nuclei. The supporting cells were triangular in shape and placed in between the coronet cells. The apical parts of the coronet cells had different shapes of globular protrusions with distinct stalks. Intense silver stain was noted in the terminal end of the coronet cells and nerves were attached with blood vessels. Under scanning electron microscopy observation, nerve fibers of different caliber were attached to the coronet cells and blood vessels. The various cells of the saccus vasculosus in N. chitala were correlated with their functional significance.

Made available in DSpace on 2013-08-12T18:37:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-03-01 Made available in DSpace on 2013-09-30T18:35:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:47:33Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:47:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-03-01 The surface epithelium of the vas deferens of Agouti paca, a wild and large South American rodent, was basically formed by principal and basal cells being only the principal cells related to endocytosis processes and also secretion taking base on their cytoplasmic ultrastructural features. Principal cell of vas deferens epithelium were characterized mainly by presence of vesicles with several shapes, sizes and internalized content at their apical cytoplasm occurring smaller pits and pale small vesicles seen next to the apical brush border of microvillus. Moreover, coated vesicles, smooth surface vesicles and great vesicles; multivesicular bodies, endosomes and lysosomes were seen. Presence of an apocrine secretory apparatus was also viewed, showing apical cytoplasmic expansions protruding into the vas deferens luminal compartment. The basal flattened cells, without luminal surface contact, occurred next to the basement membrane of the ductus, and did no exhibit special ultrastructural features. UNESP, Dept Anat, Campus de Botucatu, SP, Brazil Ctr Univ Sao Jose do Rio Preto, Sao Jose do Rio Pre, SP, Brazil UNESP, Dept Morfol & Fisiol Anim, Campus de Joboticabal, SP, Brazil UNESP, Dept Anat, Campus de Botucatu, SP, Brazil UNESP, Dept Morfol & Fisiol Anim, Campus de Joboticabal, SP, Brazil

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:21:56Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:34:47Z : No. of bitstreams: 1 2-s2.0-33746608511.pdf: 460835 bytes, checksum: 596ccfea0636f0deea5caaf2f583dbb8 (MD5) Made available in DSpace on 2014-05-27T11:21:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-08-07 Light microscopy analysis of the mural structure of the common carotid artery, internal carotid artery and external carotid artery in mongrel dog revealed variability in the middle values of vascular diameter and thickness of the intimal plus medial coats and adventitial coat. The vascular diameter did not differ between the internal carotid artery and external carotid artery, but was significantly increased in the common carotid artery from which the other two arteries had origin. The increased thickness of the intimal plus medial coats of the common carotid artery revealed the constant mechanical adjustment of the arterial wall and local shearing stress that occurred among the arterial coats. The adventitial coat of the internal carotid artery was significantly thicker than those of the common carotid and external carotid arteries, with no significant difference noted between the latter arteries. These histomorphometric results were related to the qualitative observations regarding the mural structure of the three arteries analyzed, especially regarding to the increased thickness and structural complexity of the adventitial coat of the internal carotid artery. Perhaps it acted as an external protective sheath of the vascular wall during its long course until the carotid channel. © 2006 Sociedad Chilena de Anatomía. Departamento de Anatomia/UNESP, Campus de Botucatu, SP Setor de Anatomia/Faculdade de Medicina e Enfermagem - UNIMAR, Campus de Marília, SP Departamento de Morfologia e Fisiologia Animal/UNESP, Campus de Jaboticabal, SP Instituto de Biociências Departamento de Anatomia, Distrito de Rubião Jr. s/n, CEP 18618-000, Botucatu-SP Departamento de Anatomia/UNESP, Campus de Botucatu, SP Departamento de Morfologia e Fisiologia Animal/UNESP, Campus de Jaboticabal, SP

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:04:19Z No. of bitstreams: 1 S1413-95962003000900001.pdf: 2605757 bytes, checksum: 1660c8754c42c60a0a8e0393f070fb3c (MD5) Made available in DSpace on 2013-08-22T19:04:19Z (GMT). No. of bitstreams: 1 S1413-95962003000900001.pdf: 2605757 bytes, checksum: 1660c8754c42c60a0a8e0393f070fb3c (MD5) Previous issue date: 2003-01-01 Made available in DSpace on 2013-09-30T20:07:07Z (GMT). No. of bitstreams: 2 S1413-95962003000900001.pdf: 2605757 bytes, checksum: 1660c8754c42c60a0a8e0393f070fb3c (MD5) S1413-95962003000900001.pdf.txt: 21306 bytes, checksum: 33f1944d6b30c3cd5df316ee78f80a8d (MD5) Previous issue date: 2003-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:17:09Z No. of bitstreams: 2 S1413-95962003000900001.pdf: 2605757 bytes, checksum: 1660c8754c42c60a0a8e0393f070fb3c (MD5) S1413-95962003000900001.pdf.txt: 21306 bytes, checksum: 33f1944d6b30c3cd5df316ee78f80a8d (MD5) Made available in DSpace on 2014-05-20T15:17:09Z (GMT). No. of bitstreams: 2 S1413-95962003000900001.pdf: 2605757 bytes, checksum: 1660c8754c42c60a0a8e0393f070fb3c (MD5) S1413-95962003000900001.pdf.txt: 21306 bytes, checksum: 33f1944d6b30c3cd5df316ee78f80a8d (MD5) Previous issue date: 2003-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) A estrutura segmentar da parede aórtica foi estudada em galo doméstico, em níveis torácico e abdominal, nas dimensões de microscopias óptica e eletrônica de varredura. Secções histológicas selecionadas foram submetidas a estudos histomorfométricos usando métodos de análises de imagens. As variáveis analisadas foram as espessuras das túnicas da parede aórtica em três segmentos investigados, compreendendo as porções ascendente torácica; descendente torácica e abdominal, bem como os diâmetros tubulares, em cada porção, e o número médio de lamelas elásticas na túnica média de cada segmento analisado. A parede aórtica do galo doméstico apresenta estrutura predominantemente elástica nas porções torácicas, cujo número relativo de lamelas elásticas decresce gradualmente para a parte abdominal da aorta, onde células musculares lisas predominam. Os diâmetros aórticos decrescem também gradualmente, e progressivamente, da porção torácica ascendente para a porção torácica descendente, e desta para a porção abdominal da aorta. The segmental structure of the aortic wall at the thoracic and abdominal levels were studied in domestic chicken by light microscopy (LM) and scanning electron microscopy (SEM). Selected histological sections were submitted to histomorphometric studies using image analysis methods. The variables studied were the thickness of the aortic layers in the three segments investigated: ascendant thoracic, descendant thoracic and abdominal parts as well as the tubular diameters and the mean number of elastic lamellae in the medial layer of each analyzed segment. The aortic wall of the chicken had a predominately elastic structure in the thoracic portions, that decrease gradually in relative number of elastic lamellae towards the abdominal aorta in which smooth muscle cells predominated. Vascular diameters decreased gradually to the ascendant aorta from the descendant thoracic portion and to the last from the abdominal aorta. UNIOESTE Departamento de Anatomia Centro de Ciências Biológicas e da Saúde UNESP Instituto de Biociências Departamento de Anatomia UNESP Instituto de Biociências Departamento de Bioestatística USP Faculdade de Medicina Veterinária e Zootecnia Departamento de Cirurgia UNESP Instituto de Biociências Departamento de Anatomia UNESP Instituto de Biociências Departamento de Bioestatística