The Histological Structure of the Pecten Oculi in the Ostrich (Struthio camelus australis)

Öz

The present study was aimed at investigating the pecten oculi of the ostrich by light and electron microscopy. The pecten oculi of 5 healthy adult ostriches, obtained from a slaughterhouse, constituted the material of the study. When examined macroscopically, the pecten oculi of the ostrich was observed to be a highly pigmented and relatively large fan-like shaped (vaned) structure consisting of approximately 20-24 folds. It was situated on the ventral surface of the eye and extended into the vitreous body. Light microscopic investigation revealed two or more blood vessels and numerous capillaries in each pecteneal fold. The capillaries had a thick basal lamina and numerous melanocytes and the pecten was surrounded by the vitreo-pecteneal limiting membrane. Hyalocytes were not observed outside of the vitreo-pecteneal membrane. At transmission electron microscopic (TEM) examination, endothelial cells were observed to possess a thin cytoplasm and the organelles were localized to the center of the cells. The capillary endothelium exhibited a large number of luminal and abluminal folds. Pericytes were seen lying beneath the basal lamina. In the present study, ostrich pecten oculi was examined by light and electron microscopic and compared with other poultry species and their differences were revealed.

Anahtar Kelimeler

• Ostrich,Electron microscopy,Light microscopy,Pecten oculi

Devekuşunda (Struthio camelus australis) Pekten Okulinin Histolojik Yapısı

Öz

Yapılan bu araştırmada devekuşu pekten okulisinin ışık ve elektron mikroskobik olarak incelenmesi amaçlandı. Çalışmada et tüketimine sunulan ve mezbahanede kesilen 5 adet erişkin ve sağlıklı devekuşundan alınan pekten okuli örnekleri kullanıldı. Makroskobik incelemeler sonucu, devekuşunda pekten okulinin gözün ventral yüzeyinden vitreusa doğru uzanan, koyu pigmentli, kendi üzerinde yaklaşık 20-24 adet kıvrım yapan, oldukça büyük bir yapı olduğu görüldü. Işık mikroskobik incelemelerde pekten okulinin her bir kıvrımında çok sayıda kapillar ve melanosit yanında az sayıda arter ve ven de bulunmaktaydı. Melanositlerin pekten kıvrımlarının perifer kısmında, damarların etrafında yoğunlaştığı görüldü. Yapının etrafını pekteno-sınırlayıcı membran çevrelemekteydi. Devekuşu pekten okulisinde hyalositlere rastlanmadı. TEM’de (Transmission Electron Microscope) endotel hücrelerinin ince stoplazmaya sahip olduğu ve organellerin hücrenin merkezinde, çekirdek etrafında yer aldığı gözlendi. Kapillar endotelinin çok sayıda luminal ve abluminal kıvrımı bulunmaktaydı ve kalın bir bazal laminaya sahipti. Bu laminanın altında ise perisiler gözlendi. Sunulan çalışmada devekuşu pekten okulisi ışık ve elektron mikroskobik olarak incelendi ve diğer kanatlı türleriyle karşılaştırılarak farklılıkları ortaya kondu.

Anahtar Kelimeler

• Devekuşu,Elektron mikroskop,Işık mikroskop

Kaynakça

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