Bowman's membrane

Bowman's membrane

Infobox Anatomy
Name = Bowman's membrane
Latin = l. limitans anterior corneae
GraySubject = 225
GrayPage = 1008


Caption = Vertical section of human cornea from near the margin. (Waldeyer.) Magnified.
1. Epithelium.
2. Anterior elastic lamina.
3. substantia propria.
4. Posterior elastic lamina.
5. Endothelium of the anterior chamber.
a. Oblique fibers in the anterior layer of the substantia propria.
b. Lamellæ the fibers of which are cut across, producing a dotted appearance.
c. Corneal corpuscles appearing fusiform in section.
d. Lamellæ the fibers of which are cut longitudinally.
e. Transition to the sclera, with more distinct fibrillation, and surmounted by a thicker epithelium.
f. Small bloodvessels cut across near the margin of the cornea.


Caption2 =
System =
Precursor =
MeshName = Bowman+membrane
MeshNumber = A09.371.060.217.113
DorlandsPre = l_02
DorlandsSuf = 12476272
The Bowman's membrane (Bowman's layer, anterior limiting lamina, anterior elastic lamina) is a smooth layer in the eye. It is located between the front epithelium and the stroma in the cornea. It is composed of strong collagen fibers and helps the cornea maintain its shape. If the Bowman's membrane is damaged, scarring would normally occur.

In adult humans, this layer is 8-12 μm thick. [Hogan MJ, Alvarado JA, Weddell E: Histology of the Human Eye. Philadelphia: WB Saunders, 1971]

Bowman's layer is absent in cats, dogs, and other carnivores.Merindano MD; Costa J; Canals M; Potau JM, and Ruano D. [http://www.med.ub.es/sae/EJA/EJA_V6_N3_02.pdf#search=%22%22mammalian%20cornea%22%2C%20layers%22 "A comparative study of Bowman's layer in some mammals: Relationships with other constituent corneal structures."] "European Journal of Anatomy." Volume 6, Number 3, December 2002.]

The Bowman's membrane is named after Sir William Bowman (1816 - 1892), an English physician, anatomist and ophthalmologist, who discovered this membrane.

ee also

*Refractive surgery
*Descemet's membrane

References

External links

*
* [http://www.sheinman.com/Aanatomyp4.htm Diagram at sheinman.com]
* [http://www.laservue.net/images/cornea_crosssection_en.jpgDiagram at cornea_crosssection_en.jpg]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Bowman's membrane — n the thin outer layer of the substantia propria of the cornea immediately underlying the epithelium …   Medical dictionary

  • bowman's membrane — noun Usage: usually capitalized B : the thin condensed outer layer of the substantia propria of the cornea immediately underlying the epithelium …   Useful english dictionary

  • Bowman's capsule — Bow·man s capsule .bō mənz n a thin membranous double walled capsule surrounding the glomerulus of a vertebrate nephron through which glomerular filtrate passes to the proximal convoluted tubule called also capsule of Bowman, glomerular capsule… …   Medical dictionary

  • Membrane de Descemet — Cornée Pour les articles homonymes, voir cornée (homonymie). La cornée est la partie antérieure transparente du globe oculaire, en forme de calotte sphérique et légèrement saillante. Sommaire 1 Anatomie 2 Histologie …   Wikipédia en Français

  • Bowman's capsule — Infobox Anatomy Name = Bowman s capsule Latin = capsula glomeruli GraySubject = 253 GrayPage = 1222 Caption = Glomerulus. (Bowman s capsule not labeled, but visible at top.) Caption2 = Glomerulus is red; Bowman s capsule is green. Precursor =… …   Wikipedia

  • Membrane de Bowman — La membrane de Bowman se situe entre la membrane basale épithéliale et le stroma. Individualisée chez l homme, elle mesure de 8 à 14 µm dans la partie centrale de la cornée. Elle est probablement synthétisée par les cellules basales de l… …   Wikipédia en Français

  • Membrane oxygenator — A membrane oxygenator is a device used to add oxygen to, and remove carbon dioxide from the blood. It can be used in two principal modes: to imitate the function of the lungs in cardiopulmonary bypass (CPB), and to oxygenate blood in longer term… …   Wikipedia

  • membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m …   Medical dictionary

  • Bowman's capsule — noun thin double membrane surrounding the glomerulus of a nephron • Syn: ↑glomerular capsule, ↑capsula glomeruli • Hypernyms: ↑membrane, ↑tissue layer • Part Holonyms: ↑malpighian body, ↑ …   Useful english dictionary

  • Bowman — Sir William, English ophthalmologist, anatomist, and physiologist, 1816–1892. See B. capsule, B. disks, under disk, B. gland, B. membrane, B. muscle, B. probe, B. space …   Medical dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”