Pick any two diseases that require diagnostic tests to identify them from the body system. Use one of the body systems: cardiovascular, respiratory, renal, hepatobiliary, lymphatic, reproductive or nervous systems. For each of the diseases, explain: Why is a particular test recommended? How does the test work? What information is obtained from the diagnostic test regarding the disease? Does the diagnosis need confirmation with another diagnostic test? By the due date assigned, submit your initial response to the Discussion Area. Your response(s) should clarify your understanding of the topic. They should be your own, original, and free from plagiarism. Use correct medical terminology, spelling, and grammar.