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It is simple; Email us your question and Doctor Moran will answer in the order received. Speedily! Just write your question in the box below and send it to us!
Due to high volume of mail, if you desire to be enriched during the waiting time I highly suggest you to subscribe to Dr. Dave's "KNOW THY CELLS " e-mail. "Know Thy Cells" provides simple and brilliant answers to your questions, thus facilitating the study of histology with the unique light touch and humor that made Dr. Dave the SuperHero of Beer & Pizza histo-parties across the land!
Q: "Sir as we know in columnar epithelium, the length of the cell is more than width, but it is not so - its length decreases why? The nucleas is mostly found in basal region in columnar cell but some time it is found at apex of cell why?"
A: Dear B,
Here's an answer to your question, "sir as we know in columnar epithelium leangth of cell is more than breath but it is not so its leangth decreases why ? anh nucleas is mostly found in basal region in columnar cell but some time it is fount at apex of cell why"
1) In a simple columnar epithelium, you are quite right — the cells are longer than they are wide. Although the epithelium appears static in sectioned material and in photomicrographs, in reality it is a dynamic system, moving, each cell processing materials in its organelles and cytoplasm and changing shape as it does so.
2) Consequently, the nucleus can move its location in response to functional demand. Usually, however, the nucleus is located in the basal portion of the cell. That frees up the apical region to take in materials from the lumen that overlies the epithelium.
For a more detailed discussion, please look at the chapter on "Epithelium" in our free online text-atlas, Visual Histology, found on our website
Q: "How effective are these CDs? Can these be used as CME? Can these assist students to access any of the more structured courses?
A: Dear Dr. N,
I am happy to tell you the CDs — which actually are DVDs — are really effective in getting the basics of Histology across to students in a variety of disciplines in medical science. Historically, we developed them over a period of years to help our own students learn the basics very quickly so they could then go to lecture and lab and REALLY absorb the fine points of microscopic anatomy. We taught a class of 185 Medical, Dental, and Graduate students. There were only 3 instructors, self included. Since the curriculum had been cut (I guess I should say "downsized"), we were faced with the absurd task of teaching the microscopic anatomy of the alimentary canal to 185 students in lab in one three-hour period.
That gave us about three minutes per instructor per student...and all the early questions were the same. As they looked into their microscopes, the students' questions were pretty much the same: "What should I see? Which side is up? What's that red blob on the slide?"
So — we created 26 half-hour DVD programs, each covering one basic subject in Histology (listed on our website). The results were really amazing....we found students were checking the videos out of the library in record numbers and learning the material in the context of 'histology parties" — and coming into lecture and lab well-prepared. Test scores skyrocketed...
The word got out, other Institutions started asking about them, and the end result is — these DVDs are now in use in over 1500 Universities and Hospitals in basic Histology courses.
Re; CME credits: These have helped many students (and interns and residents) earn those credits in structured courses. Which I guess answers the third part of your question: They really help structured courses, for they make the BASICS OF HISTOLOGY very easy and pleasurable to learn.
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