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Human Biology, 7/e
Dr. Sylvia S. Mader
Digestive System and Nutrition

Chapter Outline


5.1 The Digestive System

  • The human digestive system is an extended tube with specialized parts between two openings, the mouth and the anus. 82
  • Food is ingested and then digested to small molecules that are absorbed. Indigestible materials are eliminated. 82

    5.2 Three Accessory Organs

  • The pancreas, the liver, and the gallbladder are accessory organs of digestion because their activities assist the digestive process. 90

    5.3 Digestive Enzymes

  • The products of digestion are small molecules, such as amino acids, fatty acids, and glucose, that can cross plasma membranes. 92
  • The digestive enzymes are specific and have an optimum temperature and pH at which they function. 92

    5.4 Homeostasis

  • The digestive system works with the other systems of the body to maintain homeostasis. 95 s

    5.5 Nutrition

  • Proper nutrition supplies the body with energy, nutrients, and all vitamins and minerals. 95








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