 Number 12, pathophysiology. I'm a huge fan of pathophysiology as you might have gathered from my other videos already. But in my opinion, if you understand how the body is supposed to work, and then there's a disease process. So now the body doesn't function in its normal way. But you know that certain organ does these functions, but now that organ isn't working, now then you can a lot of times come up with signs and symptoms, diagnostic tests, nursing care, patient teaching any of those activities that you'll definitely encounter on your exams. So pathophysiology, understand it and be able to apply it to your patient.