FINE-STRUCTURE OF THE PECTEN OCULI OF THE RED-TAILED HAWK (BUTEO-JAMAICENSIS)

被引：21
作者：
BRAEKEVELT, CR
机构：
[1] Department of Anatomy, University of Manitoba, Winnipeg, Manitoba
来源：
ANATOMIA HISTOLOGIA EMBRYOLOGIA-JOURNAL OF VETERINARY MEDICINE SERIES C-ZENTRALBLATT FUR VETERINARMEDIZIN REIHE C | 1991年 / 20卷 / 04期
关键词：
D O I：
10.1111/j.1439-0264.1991.tb00310.x
中图分类号：
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号：
100101 ;
摘要：
The pecten oculi of the red-tailed hawk (Buteo jamaicensis) has been examined by light and electron microscopy. In this species the pecten is very large and of the pleated type. It consists of 17-18 accordion folds which are joined apically by a heavily pigmented bridge of tissue which holds the pecten in a fan-like shape, widest at its base. It is situated over the optic nerve head and extends into the vitreous. Within each fold are numerous capillaries, larger supply and drainage vessels and melanocytes. The capillaries are specialized and display extensive microfolds on both the luminal and abluminal borders. The endothelial cell bodies are thin with most organelles present in a paranuclear location. The capillaries are surrounded by thick fibrillar basal laminae which are probably structurally important and which often enclose pericytes. The melanocytes which are most plentiful in the bridge region and peripherally in the pecten, form an incomplete sheath around the capillaries and other blood vessels. These melanocytes are also felt to be fulfilling a structural role within the pecten. The morphology of the pecten of the red-tailed hawk is indicative of a heavy involvement in the transport of materials to the avascular avian retina.
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页码：354 / 362
页数：9
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共 31 条
[21]  
Prince J.H., Comparative anatomy of the eye, (1956)
[22]  
Raviola E., Raviola G., A light and electron microscopic study of the pecten of the pigeon eye, Amer. J. Anat., 120, pp. 427-462, (1967)
[23]  
Seaman A.R., Ultrafine architecture of the avian “pecten oculi, Graefe's Arch. Ophthal., 170, pp. 1-15, (1966)
[24]  
Seaman A.R., Storm H., A correlated light and electron microscope study on the pectin oculi of the domestic fowl Gallus domesticus, Exp. Eye Res., 2, pp. 163-172, (1963)
[25]  
Semba T., The fine structure of the pecten studied with the electron microscope. I Chick pecten, Kyushu J. Med. Sci., 13, pp. 217-232, (1962)
[26]  
Slonaker J.R., A physiological study of the anatomy of the eye and its accessory parts of the English sparrow (Passer domesticus), J. Morph., 31, pp. 351-459, (1968)
[27]  
Tanaka A., Electron microscopic study on the avian pectines I, Dobutsugaku Zasshi, 69, pp. 314-317, (1960)
[28]  
Tanaka H., On the pecten of Japanese birds, Jap. J. Med. Sci., 7, pp. 95-132, (1938)
[29]  
Walls G.L., The Vertebrate Eye and its Adaptive Radiation, (1942)
[30]  
Welsch U., Enzyme histochemical and fine structural observations on the pecten oculi of birds, Z. Zellforsch., 132, pp. 231-244, (1972)
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