The study of microscopic structures of tissues and organs(noun)
WordNet. Princeton University. 2010.
Use "microscopic anatomy" in a sentence
"Convinced that a knowledge of microscopic anatomy is the key to the secrets of nature, he deemed two things to be of prime importance: first, an experimental study of the histological constitution of the various organs, to learn their functions; and second, the separation of these organs into their elements, to determine their embryological origin."