A tissue is a grouping of similar cells that work
together to perform a single function. Multiple tissues are then
organized to form the separate organs of the body. There are four (4)
basic types of tissue:
* covers body
* lines hollow
* lines body
cavities and ducts
* forms glands
* protection and
together (like glue)
* energy storage
3. muscle: movement and force
4. nervous: coordinates bodily
Using a Microscope:
The digital pictures on this Web site are no substitute
for examination of actual slides microscopically. When looking at a
new slide, always start at the lowest power (usually
40X). This "bird's eye" view will allow you to survey the
tissue as a whole, and to observe the general architecture. Often, the
most important histological features of a tissue will be best
seen at low power. You will notice that many of the images on this Web
site are at 40X.
Next, go to medium power (100X) and high power (400X), to
"zero in" on individual structures and cells of interest. A
few images on this Web site are at 1000X, a high magnification obtained with
an oil-emersion objective.
About the Images:
All of the images on this site were taken in the
Cedarville University Microscopy Core Facility with several research-quality
light microscopes. The equipment also includes a digital capture unit
and a high resolution digital camera. Together with a video monitor
and computer, the system can be designated a “digital microscope” with
very powerful capabilities.
Images were captured from tissue slides, with arrows and
labels added for teaching clarity. The pictures were then compiled for
use on this Web site. These are identical to what students will see
through their microscopes in a histology lab exercise.
Partial funding for this site was through the Cedarnet
Faculty Incentive Program.
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