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32.4 Excretory System

32.4 Excretory System

32.4 Excretory

CHAPTER 32 Digestive and Excretory Systems KEY CONCEPTS 32.1 Nutrients and Homeostasis Cells require many different nutrients. 32.2 Digestive System The digestive system breaks down food into simpler molecules. 32.3 Absorption of Nutrients Nutrients are absorbed and solid wastes eliminated after digestion. 32.4 Excretory System The excretory system removes wastes and helps to maintain homeostasis. BIOLOGY CLASSZONE.COM BIOLOGY View animated chapter concepts. • Digestive System • Run the Digestive System Keep current with biology news. • Featured stories • Strange Biology • Polls RESOURCE CENTER Get more information on • Nutrition • Urinary System 970 Unit 9: Human Biology