Porth Pathophysiology: understanding made easy, delivered however you need it. Porth's "Essentials of Pathophysiology" 3/e delivers exceptional student understanding and comprehension of pathophysiology. An expanded, robust and flexible suite of supplements - makes it easy for you to select the best course resources - so you can meet your student's changing needs. For both discrete and hybrid courses, the flexibility and power of Porth allows you to customize the amount of pathophysiology that you need for effective teaching and learning.