Summary
The ultrastructure of the bridge of the pecten oculi was studied in the newlyhatched chick. Whereas most of the bridge resembled the pleats in being composed of small blood vessels and intervening pigment cells, the distal portion of the bridge consisted of polarized pigment cells only. The processes of the pigment cells extended into the vitreous body and were covered by a discontinuous dense lamina, believed to be continuous with that of the internal limiting membrane of the retina. It did not form a complete separation between the bridge and the vitreous body. Intercellular spaces were not conspicuous, although the considerable structural variations dependent on the techniques employed need to be stressed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Ashton, N. and F. de Oliveira: Nomenclature of pericytes, intramural and extramural. Brit. J. Ophthal. 50, 119–123 (1966).
Bacsich, P. u. A. Gellért: Beiträge zur Kenntnis der Struktur und Funktion des Pectens im Vogelauge. Albrecht v. Graefes Arch. Ophthal. 133, 448–460 (1935).
Cohen, A. I.: Electron microscopic observations of the internal limiting membrane and optic fiber laver of the retina of the rhesus monkey (M. mulatta). Amer. J. Anat. 108, 179–197 (1961).
Elfont, E. A.: A phase contrast and electron microscope study of asteroid coelomocytes. Master's Thesis Georgetown University Washington D.C. 1967.
Erlandson, R. A.: A new maraglas, D.E.R. 732 embedment for electron microscopy. J. Cell Biol. 22, 704–709 (1964).
Fawcett, D. W.: An atlas of fine structure. The cell. Philadelphia: W. B. Saunders Co. 1966.
Fischlschweiger, W., and R. O'Rahilly: The ultrastructure of the pecten oculi in the chick. Acta anat. (Basel) 65, 561–578 (1966).
François, J., M. Rabaey, and A. Lagasse: Electron microscopic observations on choroid, pigment epithelium and pecten of the developing chick in relation to melanin synthesis. Ophthalmologica (Basel) 146, 415–431 (1963).
Luft, J. H.: Improvements in epoxy resin embedding methods. J. biophys. biochem. Cytol. 9, 409–414 (1961).
Maunsbach, A. B.: The influence of different fixatives and fixation methods on the ultrastructure of rat kidney proximal tubule cells. II. Effects of varying osmolality, ionic strength, buffer system and fixative concentration of glutaraldehyde solutions. J. Ultra struct. Res. 15, 283–309 (1966).
O'Rahilly, R.: The early development of the eye in staged human embryos. Contr. Embryol. Carneg. Instn 38, 1–42 (1966).
—, and D. B. Meyer: The development and histochemistry of the pecten oculi. In: The structure of the eye (ed. G. K. Smelser), p. 207–219. New York: Academic Press 1961.
Pease, D. C.: Histological techniques for electron microscopy, 2nd ed. New York: Academic Press 1964.
Provenza, D. V., W. Fischlschweiger, and R. F. Sisca: Fibres in human dental papillae. A preliminary report on the fine structure. Arch. oral Biol. 12, 1533–1539 (1967).
Raviola, E., and G. Raviola: A light and electron microscopic study of the pecten of the pigeon eye. Amer. J. Anat. 120, 427–461 (1967).
Reynolds, E. S.: The use of lead citrate at high pH as an electron opaque stain in electron microscopy. J. Cell Biol. 17, 208–212 (1963).
Seaman, A. R., and T. M. Himmelfarb: Correlated ultrafine structural changes of avian pecten oculi and ciliary body of Gallus domesticus: Preliminary observations on the phy siology: 1. Effects of decreased intraocular pressure induced by intravenous injection of acetazolamide (Diamox). Amer. J. Ophthal. 56, 278–296 (1963).
—, and H. Storm: A correlated light and electron microscope study on the pecten oculi of the domestic fowl (Gallus domesticus). Exp. Eye Res. 2, 163–172 (1963).
Semba, T.: The fine structure of the pecten studied with the electron microscope. 1 Chick. pecten. Kyushu J. med. Sci. 13, 217–232 (1962).
Sicher, H. (ed.): Orban's oral histology and embryology, sixth ed. St. Louis: C. V. Mosby Co. 1966.
Tanaka, A.: Electron microscopic study of the avian pecten. I. Dobutsugaku Zasshi 69, 314–317 (1960).
Wingstrand, K. G., and O. Munk: The pecten oculi of the pigeon with particular regard to its function. Biol. Skr. Dan. Vid. Selsk. 14, 1–64 (1965).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fischlschweiger, W., O'Rahilly, R. The ultrastructure of the pecten oculi in the chick. Z.Zellforsch 92, 313–324 (1968). https://doi.org/10.1007/BF00455589
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00455589