College of the Siskiyous

BIO 2700 - Human Anatomy - Histology

Before viewing slides, please read this for some background on how the photos were taken and the magnifications of the photographs you will be looking at.

How the images were acquired?

These images were gathered in two basic ways. Some of the lowest power images are scans taken by a scanner. These do not have much detail, but they give you a feel for what the overall slide looks like. This is really important for slides in which the sample is too big to see the whole thing under low power. For example, the lymph node is way too big to see at low power. When looking at the scanned image, you can see the whole thing - the low power image is just looking at about the part I have put a box around. In fact, you should look at the slide against some white paper before putting it on the stage of your microscope. Not all samples are so big that they will have a scanned image.

The other images were all taken with our digital microscope. This microscope has the same power lenses that your microscopes have  - ow power is 40x, medium power is 100x, high power is 400x.

In addition to these standard magnifications are the "SUPERHIGH" power images. On these I digitally zoomed all the way in to get detail on one thing or another. There is no way you will be able to get that kind of detail on your microscopes, so don’t try!  But I think those images are of value. For example, here is an image of the trachea at normal high power, and here is one with the camera zoomed all the way in. Notice that at normal high the cilia looks like a fuzz and with the zoomed image you can actually see them.

Every (almost) photograph has an S, L, M, H or SH in the upper righthand power. They refer to the power (Scan, Low, Medium, High, SuperHigh) at which the photo was taken.

How to use the images?

For each exam there are two PowerPoints – a version with everything you need to know labeled and with many explanations embedded, and a version that is the same images, but without the labels. The idea to the second is that you can download the second version and use PowerPoint to mix up photos to create your own little quiz packets.

There is also a version in which the labeled PowerPoint has been saved as a PDF file. This is here because some of you may not have a program that can 'see' PowerPoint.

The best way to use these would be to download and save it to your own computer. That way, you do not have to wait for it to download every time you want to open it. When you click on this file to open it, you will be given the option of "saving" it or just "opening" it. Tell it to save, pick a location to save it to, and wait.

Some of you may want to print the entire slide show out. Some comments about that.

  • If you just tell the program to 'print', it'll do so at a rate of one image per page, and since the PowerPoints are all at least dozens of images in size that'll be a huge amount of ink. So, you might want to direct the program to print two, three, four, or even six images per page. If you don't know how to do that you can google it or ask me to show you.
  • Also, remember that these are color images. Printing them all out in color will go through your cartridges quickly. You should be able to direct the program to print in black and white, though.
  • Do not use college printers for this task.

Exam 1 - labeled (PowerPoint)

Exam 1 - labeled (PDF)

Exam 1 - unlabeled (PowerPoint)

Exam 2 - labeled (PowerPoint)

Exam 2 - labeled (PDF)

Exam 2 - unlabeled (PowerPoint)

Exam 3 - labeled (PowerPoint)

Exam 3 - labeled (PDF)

Exam 3 - unlabeled (PowerPoint)

Exam 4 - labeled (PowerPoint)

Exam 4 - labeled (PDF)

Exam 4 - unlabeled (PowerPoint)

A last important note: Photos used for the PowerPoint portions of the exams will come from the rest of our library, not these photos. So do not use these as your only study tool - use the microscopes!

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