Article: Fine structure of the ependymal cells in the area postrema of the domestic fowl

The ultrastructure of the ependymal cells in the area postrema of the domestic fowl was studied by scanning and transmission electron microscopy. The ependymal surface of the area postrema is covered with many furrows and ridges. These ridges consist of ependymal cells aggregated in a fan-like shape. The ependymal cell lacks clustered cilia, microvilli are few, and a long basal process extends through the parenchymal layer of the area postrema. Within the cytoplasm as well as in the basal process, a spherical body with a diameter ranging from 1.5 to 2 micron is occasionally observed.

Citing Articles

The ventricular system of the pigeon brain: a scanning electron microscope study.

Mestres P, Rascher K J Anat. 1994; 184 ( Pt 1):35-58.

PMID: 8157492 PMC: 1259925.

Specialized ependyma in the posterior mesencephalon of the chicken: the fine structure of the subtrochlear organ.

Uryu K, Hirunagi K, Fujioka T Cell Tissue Res. 1988; 254(3):531-8.

PMID: 3233649 DOI: 10.1007/BF00226502.

References

1.

Leslie R, GWYN D, Morrison C . The fine structure of the ventricular surface of the area postrema of the cat, with particular reference to supraependymal structures. Am J Anat. 1978; 153(2):273-90. DOI: 10.1002/aja.1001530207. View

2.

Nozaki M . Tanycyte absorption affected by the hypothalamic deafferentation in Japanese quail, Coturnix coturnix japonica. Cell Tissue Res. 1975; 163(4):433-43. DOI: 10.1007/BF00218490. View

3.

Brawer J . The fine structure of the ependymal tanycytes at the level of the arcuate nucleus. J Comp Neurol. 1972; 145(1):25-41. DOI: 10.1002/cne.901450103. View

4.

Schinko I, Rohrschneider I, WETZSTEIN R . [Electron-microscopic investigations on the subfornical organ of the mouse]. Z Zellforsch Mikrosk Anat. 1972; 123(2):277-94. View

5.

Mikami S, Asari M . Ultrastructure of the subfornical organ of the Japanese quail, Coturnix coturnix. Cell Tissue Res. 1978; 188(1):19-33. DOI: 10.1007/BF00220512. View

6.

Tanaka K, IINO A, Naguro T . Styrene resin cracking method for observing biological materials by scanning electron microscopy. J Electron Microsc (Tokyo). 1974; 23(4):313-5. View

7.

Sharp P . Tanycyte and vascular patterns in the basal hypothalamus of Coturnix quail with reference to their possible neuroendocrine significance. Z Zellforsch Mikrosk Anat. 1972; 127(4):552-69. DOI: 10.1007/BF00306871. View

8.

Rohrschneider I, Schinko I, WETZSTEIN R . [Fine structure of the area postrema in the mouse]. Z Zellforsch Mikrosk Anat. 1972; 123(2):251-76. View

9.

Klara P, BRIZZEE K . Ultrastructure of the feline area postrema. J Comp Neurol. 1977; 72(3):409-31. DOI: 10.1002/cne.901710307. View

10.

Klara P, BRIZZEE K . The ultrastructural morphology of the squirrel monkey area postrema. Cell Tissue Res. 1975; 160(3):315-26. DOI: 10.1007/BF00222042. View

11.

Mikami S . Ultrastructure of the organum vasculosum of the lamina terminalis of the Japanese quail, Coturnix coturnix japonica. Cell Tissue Res. 1976; 172(2):227-43. DOI: 10.1007/BF00226029. View

12.

Takei Y, Tsuneki K, Kobayashi H . Surface fine structure of the subfornical organ in the Japanese quail, Coturnix coturnix japonica. Cell Tissue Res. 1978; 191(3):389-404. DOI: 10.1007/BF00219804. View

13.

Bohme G . [An organ-like structure in the fourth ventricle of the chicken]. Verh Anat Ges. 1970; 64:245-50. View

Fine Structure of the Ependymal Cells in the Area Postrema of the Domestic Fowl