pardon.....can't be difficult if I can do it (unconsciously competent?) - that's true:-)
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Everyone finds some things more difficult than others. Try considering "difficulty" as just a state of mind. My 8-year-old son understands the basic concepts of pathology! The important thing initially is to understand the overarching concepts and it helps if one knows the normal structure and function of particular organs and tissues. Causes of pathology lead to abnormal structure, abnormal function and result in sub-clinical disease or clinical signs. There are a limited number of types of insult that can occur to any animal/organ system and an equally limited number of ways in which tissues can respond. Dysfunction of that organ/tissue results in a restricted number of clinical signs. Appreciate that and all that one needs is to build up the details....