Hints for Slide CRR 07.  

General hints for all slides.

SAQ Slide Index.

This specimen is fairly difficult, because the critical features are obscure and the most distinctive of these is not covered by the CRR curriculum. Note that the specimen consists of layers. The innermost layer (1) is a mucosa, lined by an epithelial surface. The next layer (2) is a thick layer composed of acidophilic fibers. What tissue elements give the appearance of acidophilic fibers? What special features distinguish these different fibrous tissue elements? The third layer (3) is an adventitia (i.e., connective tissue that binds the organ, more or less loosely, to surrounding organs.   These layers, with a mucosal surface, indicate that this is the wall of a hollow organ.    In any hollow organ, the most distinctive histological feature is usually the type of epithelial surface (4).  Unfortunately, due to post-mortem deterioration, many of the epithelial cells have separated from this specimen.  The result is an epithelium that does not look like text-book examples.  Nevertheless, certain types of epithelium can be excluded by careful examination.   The type of muscular and/or connective tissue comprising the remaining thickness of an organ's wall is also characteristic.   Among the various organs considered during CRR, which ones have features consistent with observations above?   Hints on the next page are a bit more pointed.  Don't look unless you are stuck. More hints.

 

Comments and questions: dgking@siu.edu

SIUC / School of Medicine / Anatomy / David King

http://www.siumed.edu/~dking2/crr/SAQcrr07.htm
Last updated:  18 November 2009 / dgk