The study of the changes in organs and tissues that are caused by or give rise to disease. This involves the examination of tissue samples, X-ray photographs, or other evidence taken from living patients or from cadavers. Clinical pathology applies these findings to clinical cases, particularly in the development of diagnostic tests and treatments. In experimental pathology, disease processes are studied using experimental animals, cell cultures, or other means.

https://library.med.utah.edu/WebPath/webpath.html#MENU An Internet Pathology Laboratory providing an online resource for pathology students, from Florida State University College of Medicine