The liver is divided into four lobes of unequal size and shape.
It is both the heaviest internal organ and the largest gland in the human body. In adults, the liver normally weighs about 1.5 kg (about 3.3 lb). The liver is a reddish brown, wedge-shaped structure. In fact, some estimates put the number of functions of the liver at about 500! A few of them are described below. The liver plays an important role in digestion by secreting bile, but the liver has a wide range of additional functions unrelated to digestion. It lies just below the diaphragm, to the right of the stomach. The liver is a vital organ located in the upper right part of the abdomen. You can see the three organs and their locations in Figure 15.6.2. These organs secrete or store substances that are needed for digestion in the first part of the small intestine - the duodenum - where most chemical digestion takes place. Besides the liver, the major accessory organs of digestion are the gallbladder and pancreas.
This is where the accessory organs secrete their digestive substances.Īccessory organs of digestion are organs that secrete substances needed for the chemical digestion of food, but through which food does not actually pass as it is digested. In this figure, the pink tubular structure that starts at the lower stomach and wraps around the pancreas is the duodenum of the small intestine.
What Are Accessory Organs of Digestion? Figure 15.6.2 The liver, gallbladder, and pancreas are the major accessory organs of digestion. Chapter 1 - Nature and Processes of Scienceġ.1 Case Study: Why Should You Learn About Science?ġ.7 Pseudoscience and Other Misuses of Scienceġ.8 Case Study Conclusion: To Give a Shot or NotĢ.1 Case Study: Why Should You Study Human Biology?Ģ.6 Case Study Conclusion: Our Invisible InhabitantsĤ.14 Case Study Conclusion: More Than Just Tiredĥ.10 Mendel's Experiments and Laws of Inheritanceĥ.12 Sexual Reproduction, Meiosis, and Gametogenesisĥ.18 Case Study Conclusion: Cancer in the FamilyĦ.1 Case Study: Our Similarities and DifferencesĦ.4 Human Responses to Environmental StressĦ.9 Case Study Conclusion: Your Genes May Help You Save a Lifeħ.9 Case Study Conclusion: Under PressureĨ.1 Case Study: The Control Centre of Your Bodyġ0.1 Case Study: Skin, Hair, and Nails - Decorative but Functionalġ0.2 Introduction to the Integumentary Systemġ0.8 Case Study Conclusion: Wearing His Heart on His Sleeveġ1.8 Case Study Conclusion: A Pain in the Footġ2.7 Case Study Conclusion: Needing to Relaxġ3.1 Case Study: Respiratory System and Gas Exchangeġ3.2 Structure and Function of the Respiratory Systemġ3.7 Case Study Conclusion: Cough That Won't Quitġ4.1 Case Study: Your Body's Transportation Systemġ4.2 Introduction to the Cardiovascular Systemġ5.2 Introduction to the Digestive Systemġ5.7 Disorders of the Gastrointestinal Tractġ5.8 Case Study Conclusion: Please Don’t Pass the Breadġ6.5 Ureters, Urinary Bladder, and Urethraġ6.7 Case Study Conclusion: Drink and Flushġ7.7 Case Study Conclusion: Defending Your Defensesġ8.2 Introduction to the Reproductive Systemġ8.3 Structures of the Male Reproductive Systemġ8.4 Functions of the Male Reproductive Systemġ8.5 Disorders of the Male Reproductive Systemġ8.6 Structures of the Female Reproductive Systemġ8.7 Functions of the Female Reproductive Systemġ8.9 Disorders of the Female Reproductive Systemġ8.12 Case Study Conclusion: Trying to ConceiveĬhapter 1 Answers: Nature and Processes of ScienceĬhapter 2 Answers: Biology: The Study of LifeĬhapter 7 Answers: Introduction to the Human BodyĬhapter 14 Answers: Cardiovascular System
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