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Öğe The scanning electron and light microscopic structure of bovine tactile hair(Blackwell Verlag Gmbh, 2004) Yildiz, D.; Gultiken, M.E.; Karahan, S.Bovine tactile hairs in skin samples from the lateral side of the upper lip were examined using scanning electron and light microscopy. The root of these hairs has a variable length and is surrounded by a large sinus located between the internal and the external dermal sheath. With a prominent thickness, the external dermal sheath forms the external wall of the tactile hair and contains many nerves some of which extend into trabeculae. Trabeculae projecting from the internal dermal sheath and attaching to the external dermal sheath with two or more branches are present in the entire sinus. The trabeculae are interconnected by connective tissue sheets that support the integrity of the trabecular organization. The sinus surfaces as well as trabeculae are lined by endothelia. As a result, the bovine tactile hair is truly a cavernous type of tactile hair with a well organized microscopic anatomy. Thus, the bovine tactile hair most likely plays an important role in relatively immobile and insensitive bovine lips.Öğe SEM investigation of the avian atrium wall(Ecole Nationale Veterinaire Toulouse, 2004) Yildiz, D.; Gultiken, M.E.In this study, the atrium wall of the chicken was investigated by Scanning Electron Microscopy (SEM) and routine histology. The wall of the left atrium was thicker and more uniform than that of the right atrium. However, the lumen of the right atrium was more voluminous than that of the left atrium. The average thickness of the pectinate muscles was 0.9 mm on the left atrium while 0.7 mm on the right atrium. The pectinate muscles were connected by the muscle bridges on the left atrium, but not on the right. The depressions on the right atrium wall were well defined and polygonal in shape; however, depressions on the left atrium were not as prominent.Öğe Vascularisation of the cerebellar nuclei in Akkaraman sheep(Akademiai Kiado, 2003) Yildiz, D.; Gultiken, M.E.This study reports an anatomical study of the vascular supply in 20 Akkaraman sheep cerebelli from adult subjects of both sexes. The origin and branching pattern of the cerebellar artery vascularising the cerebellar nuclei were studied by gross dissection and vascular injection. Then dissection was performed and vessels nourishing the cerebellar nuclei were documented. Four bilaterally symmetrical cerebellar nuclei were determined as nucleus lateralis cerebelli, nucleus interpositus lateralis cerebelli, and nucleus interpositus medialis cerebelli and nucleus fastigii from lateral to medial side. It has been previously confirmed that vascularisation of the cerebellar nuclei is carried out by intermediary branches of the rostral cerebellar artery and the caudal cerebellar artery. However, this study has confirmed that the caudal cerebellar artery has no contribution in the vascularisation of the cerebellar nuclei.