| 1. | Volkmann canal connecting 2 Haversian canals |
| 2. | Concentric lamellae and osteocytic lacunae of osteon |
| 3. | Part of interstitial lamella |
| 4. | Osteonic (Haversian) canal |
 | Volkmann canal connecting 2 Haversian canals |
 | Concentric lamellae and osteocytic lacunae of osteon |
 | Part of interstitial lamella |
 | Osteonic (Haversian) canal |
|
|
Calcified bone is displayed in ground sections. Bone from which the calcium has not been removed is sawed into relatively thick slices. These are then ground thin and smooth, which destroys the organic components, like bone cells and blood vessels. The dye, e.g. basic fuchsin, infiltrates the resulting empty spaces which previously contained bone cells with their processes. This renders the architecture of the lamellar bone visible. The ground section is more or less intensively stained, depending on how well the dye has infiltrated the empty spaces.
Kompakter Knochen besteht aus parallelen Knochensäulen. In jeder Säule sind konzentrische Knochenlamellen um einen Kanal mit Blut- und Lymphgefäßen sowie Nerven gewickelt. Die Gefäß-Nerven-Kanäle nennt man Havers-Kanäle oder Zentralkanäle. Mit den konzentrischen Lamellen bilden sie Osteone (Havers-Systeme). Die Havers-Kanäle stehen untereinander sowie mit dem Endost und Periost durch querverlaufende Kanäle, den Volkmann-Kanälen in Verbindung.
Magnification:
28x
Magnification:
64x
Magnification:
80x
Magnification:
128x
1. Organization of the screen surface
Right side: histologic specimen
Left side: information about the specimen (above) and general program functions (below)
2.Histologic specimen
Pull the mouse across the histologic specimen for training purposes. A small square with exclamation marks (dynamic labels) will appear where there is an important structure. You should then decide what structure this could be. To check your result, simply click the appropriate square, and the correct label will appear. The option “marked” allows you to see all labels for all structures simultaneously. These can be removed by clicking “unmarked”. This reactivates the dynamic labels.
3. Complementary information
Info: general information about the specimen, as well as a list of the dynamic labels
Drawing: schematic drawing of the specimen
Staining: information about the staining method for this specimen
Knowledge: short texts with basic histologic information, presently deactivated
4. General Program Functions
Home: returns you to the “start” page
Tutor: how to contact the HistoNet Team
Help: Instructions for Use appear
Exit: closes down the HistoNet program
Boxes: goes back to the other specimen of a topic
VM: provides virtual microscopy
We hope you will enjoy working with HistoNet2000 and learn a lot from it!