Mídia Celular: uso pela população de renda baixa, São Paulo - Brasil

Bacha, Maria de Lourdes; Utsunomiya, Fred Izumi; Gimenes, Roseli; Schaun, Angela; Reis, Mariza de Fatima

doi:10.5841/extraprensa.v1i1e.83

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“…The muscular stomach in these birds is considered a compensatory organ for the lack of a chewing system and plays an important role in the mechanical phase of digestion as a filter for undigested material such as bones, feathers, and hair. The koilin layer is the most notable structure in the muscular stomach, and it has been described in different species (Bacha & Bacha, 2003; Dellmann & Eurell, 2006; Hanafy et al, 2020). The koilin layer is a keratinoid substance, a polysaccharide‒protein complex (McLelland, 1991).…”

Section: Discussionmentioning

confidence: 99%

Seasonal Variations in the Digestive Tract of the Little Owl, Athene noctua: Anatomical, Histological, and Scanning Electron Microscopical Studies

2022

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The digestive tract of the little owl, Athene noctua (Strigiformes: Strigidae), is described in two different seasons. The digestive tract of this bird follows the basic model for that of a predatory bird. The cervical esophagus is not expanded to form a crop. The internal surface of the esophagus forms numerous longitudinal folds provided with numerous mucous glands. These longitudinal folds increase in number and vary in depth posteriorly. The folds of the proventriculus are composed of simple branched tubular glands. The ventriculus is lined by a thin layer of koilin. The number of goblet cells gradually increases from the duodenum to the rectum, and the lymphatic tissue diffuses within the lamina propria. The esophageal glands secrete acid mucopolysaccharides, while the gastric glands of the stomach, the goblet cells, and crypts of Lieberkühn secrete acid mucopolysaccharides. Proteins were observed in the different histological structures of the digestive tract. Morphometric and histometric studies showed differences between summer and winter in the esophagus and glandular stomach (especially in winter), but no seasonal differences were seen in the muscular stomach, or small and large intestines.

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Section: Discussionmentioning

confidence: 99%