Histological methods have contributed significantly to our understanding of
in vitro culture systems. A good histological study based on anatomical an
d histochemical changes provides insight into cellular processes and provid
es clues that allow for the proposal of hypotheses for further experimentat
ion. This article sen;es to draw attention to the use of a histological app
roach to one's experimental system. Some of the common mistakes in the hand
ling and processing of explants are discussed. A protocol for the plastic e
mbedding method is detailed.