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Previous issue date: 2015-06-30 / Neste estudo foram utilizados 07 exemplares de Cichlasoma orientale, com objetivo de caracterizar
morfohistologicamente o trato digest?rio dessa esp?cie. A cavidade bucofaringeana deste peixe foi
investigada por meio de lupa e microsc?pio eletr?nica de varredura e exibiu caracter?sticas como boca
terminal com protractibilidade, l?bios liso sendo o superior de menor espessura que o l?bio inferior, a
l?ngua triangular e pigmentada, maxila arredondada com pregas palatinas, valva respirat?ria e placas
dent?geras com dente c?nico. Na faringe evidencia-se a presen?a de duas placas dent?geras com
dent?culos c?nicos, os rastros se apresentam curtos, apenas no primeiro arco braquial e exclusivamente
presentes em esp?cimes jovens. As t?cnicas de colora??o HE-Hematoxilina de Harris, Eosina e
Peri?dico Schiff foram utilizadas para caracterizar morfologicamente as camadas do tubo digest?rio
com auxilio do microsc?pio optico. O es?fago ? curto com pregas na mucosa revestidas por epit?lio
pseudoestratificado com c?lulas mucosecretora que se intercalam com c?lulas n?o secret?rias. A
camada muscular esof?gica ? espessa com predom?nio de fibras de m?sculo esquel?tico estriado que
pode ser evidenciado inclusive pr?ximo ao est?mago. Estas caracter?sticas, provavelmente est?o
envolvidas ao h?bito de deglutir presas maiores e prote??o. O est?mago tem formato em Y possuindo
tr?s regi?es, todas revestidas por epit?lio simples e provavelmente absortivo. A c?rdica, sem camada
muscular da mucosa, com l?mina pr?pria glandular; a f?ndica com muitas pregas mucosas, delgada
muscular da mucosa e grande quantidade de gl?ndulas g?stricas; por fim a regi?o pil?rica ? tamb?m
glandular e a camada muscular mais espessa quando comparadas as outras regi?es. As caracter?sticas
morfol?gicas estomacais indicam um est?mago especializado na digest?o qu?mica, ?cida e proteica. O
intestino apresenta-se, anatomicamente, curto com duas al?as intestinais e com tr?s regi?es anterior,
m?dia e posterior bem distintas. Quanto ? camada da mucosa, o epit?lio por todo o intestino, tem
revestimento do tipo cil?ndrico simples observando-se c?lulas caliciformes e enter?citos, vilosidades
tamb?m est?o presentes. O ?rg?o ? totalmente aglandular e provavelmente respons?vel, mais
intensamente com a absor??o sendo a digest?o intestinal possivelmente dependente de secre??es
hepatopancre?ticas. A morfologia identificada em Cichlasoma orientale apresenta ?rg?os adaptados ao
habito alimentar on?voro com tend?ncia alimentar ? carnivoria. / This study used 07 specimens of Cichlasoma orientale, in order to characterize morfohistologicamente
the digestive tract of this species. The bucofaringeana cavity of this fish was investigated by means of
magnifying glass and scanning electron microscope and exhibited characteristics as terminal mouth
with protractibilidade, smooth lips and the upper thinner than the lower lip, triangular and pigmented
tongue, rounded jaw with palatine folds, breathing valve and dentigerous plates with conical teeth. In
the pharynx highlights the presence of two plates with tapered indentations dentigerous, the tracks are
shown shorter, only the first brachial arch and exclusively present in young animals. Technical HEHarris
hematoxylin staining, eosin and Periodic Schiff were used to characterize morphologically the
layers of the digestive tract with the aid of optical microscope. The esophagus is short with folds
mucosa lined by pseudostratified epithelium with mucosecretora cells that are interspersed with nonsecretory
cells. The esophageal muscle layer is thick with predominance of striated skeletal muscle
fibers which can be evidenced even close to the stomach. These features are probably involved the
swallowing habit largest and protection prey. The stomach has format in Y having three regions, all
overlaid by a simple epithelium and probably absorptive. The cardial without muscular layer of
mucosa with glandular lamina propria; the fundus with many folds mucosa, muscular thin mucous and
lot of gastric glands; Finally the pyloric gland and is also thicker muscle layer when compared to other
regions. The stomach morphological characteristics indicate a specialized stomach chemistry, acid and
protein digestion. The intestine presents itself, anatomically, with two short bowel loops with three
anterior, middle and posterior distinct. The layer of the mucosa, the intestinal epithelium throughout, it
has a single cylindrical type coating observing goblet cells and enterocytes, villi are also present. The
Board is fully responsible aglandular and probably more intensely with the absorption and intestinal
digestion possibly dependent hepatopancre?ticas secretions. The morphology identified in Cichlasoma
orientale presents organs adapted to the omnivorous eating habits to feed the carnivorous trend.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20359 |
| Date | 30 June 2015 |
| Creators | Silva, Glaucia Mois?s Marques e |
| Contributors | 91439760420, http://lattes.cnpq.br/6590909272236189, Moura, Carlos Eduardo Bezerra de, 03597959431, http://lattes.cnpq.br/4717410137206021, Nascimento, Wallace Silva do, 04623697495, http://lattes.cnpq.br/6793530795042756, Farias, Naisandra Bezerra da Silva |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM BIOLOGIA ESTRUTURAL E FUNCIONAL, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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