Optic Nerve

Section of the optic nerve behind the lamina cribrosa sclerae.

1 Ciliary nerve

2 Sclera

3 Pigment epithelium of the lamina suprachoroidea

4 Fiber bundles of the optic nerve

5 Central retinal artery

6 Sept a of the piamater

7 Central retinal vein

8 Internal sheath of the optic nerve (piamater)

9 External sheath of the optic nerve (dura mater)

10 Subdural space

11 Arachnoidea

12 Short posterior ciliary artery

Stain: hematoxylin-eosin; magnification: × 20

Optic Nerve

Cross-section of the optic nerve behind the lamina cribrosa sclerae. The axons of the ganglia cells are combine d in bundles 1 . They are envelope d by a thin septum of the piamater 2 . The optic nerve contains a piamater sheath,  an arachnoidea sheath and a dura mater sheath. The piamater sheath attaches directly to the optic nerve. Septa originate with the piamater and guide blood vessels to the myelinate  nerve f ibers. The nerve fiber bundles contain astrocytes and oligodendrocytes. Arteries 3 and central retinal veins 4 are visible in the center of the section. The vessels are sheathed by the loose connective tissue of the piamater.

1 Nerve fiber bundles

2 Piamater septa

3 Central retinal arter y

4 Central retinal vein

Stain: hematoxylin-eosin; magnification: × 40

References

Kuehnel, W.(2003). Color Atlas of Cytology, Histology, and Microscopic Anatomy. 4^th edition . Institute of Anatomy Universitätzu Luebeck Luebeck, Germany . Thieme Stuttgart · New York .

مواضيع ذات صلة

إنقسام الخلية النباتية Plant Cell Division

الرايبوسومات Ribosomes

Ameboid Movement

The Mitochondria Extract Energy From Nutrients

Synthesis of Cellular Structures by Endoplasmic Reticulum and Golgi Apparatus

Ingestion by the Cell—Endocytosis

Comparison of The Animal Cell with Precellular Forms of Life

Cell Cytoskeleton—Filament and Tubular Structures

Mitochondria

Endoplasmic Reticulum

Cell Membrane

Organization of the Cell