Questions

  1. #33 Junction of Esophagus and Stomach, Human.
    How can you diagnose whether you are looking at the upper or lower portion of the esophagus?
  2. #35 Stomach and Duodenum, Human or Monkey
    To what ultrastructural feature does the striated border correspond?
  3. #101a (PAS) Small Intestine. Guinea Pig
    In the lamina propria there are macrophages with irregular-sized PAS-positive inclusions. There are also mast cells. What accounts for the intense PAS-positivity of these cells?

Electron Micrographs

Be sure that you examine the electron micrographs in the lab so that you understand the ultrastructural equivalents of the structures you have seen under the microscope.

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