X1011691245-00074-20472</DOCNO> biosurf unit 8 Human Biology lesson 30.1 lesson 30.2 lesson 30.3 lesson 30.4 lesson 30.5 CHAPTER 30: Digestive and Excretory Systems 30.1 DIGESTION General Anatomy of the Ruminant Digestive System How do cows and other ruminants digest their food?