1. Essentials of Human Anatomy & Physiology Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slides 14.15 – 14.32 Seventh Edition Elaine N. Marieb Chapter 14 The Digestive System and Body Metabolism Lecture Slides in PowerPoint by Jerry L. Cook

2. Stomach Anatomy Slide 14.15a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Located on the left side of the abdominal cavity  Food enters at the cardioesophageal sphincter  When full can hold 4 Liters of food

3. Stomach Anatomy Slide 14.15b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Regions of the stomach  Cardiac region – near the heart  Fundus  Body  Phylorus – funnel-shaped terminal end  Food empties into the small intestine at the pyloric sphincter

4. Stomach Anatomy Slide 14.16a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Rugae – internal folds of the mucosa  External regions  Lesser curvature  Greater curvature

5. Stomach Anatomy Slide 14.17 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 14.4a

6. Stomach Functions Slide 14.18 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Acts as a storage tank for food  Site of food breakdown  Chemical breakdown of protein begins  Delivers chyme (processed food) to the small intestine

7. Small Intestine Slide 14.21 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  The body’s major digestive organ  Site of nutrient absorption into the blood  Muscular tube extending form the pyloric sphincter to the ileocecal valve  Suspended from the posterior abdominal wall by the mesentery

8. Subdivisions of the Small Intestine Slide 14.22 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Duodenum  Attached to the stomach  Curves around the head of the pancreas  Jejunum – middle section  Attaches anteriorly to the duodenum  Ileum  Extends from jejunum to large intestine

9. Chemical Digestion in the Small Intestine Slide 14.23a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Source of enzymes that are mixed with chyme  Intestinal cells  Pancreas  Bile enters from the gall bladder

10. Villi of the Small Intestine Slide 14.24 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Fingerlike structures formed by the mucosa  Give the small intestine more surface area Figure 14.7a

11. Large Intestine Slide 14.28 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Larger in diameter, but shorter than the small intestine  Frames the internal abdomen

12. Large Intestine Slide 14.28 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 14.8

13. Functions of the Large Intestine Slide 14.29 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Absorption of water  Eliminates indigestible food from the body as feces  Does not participate in digestion of food  Goblet cells produce mucus to act as a lubricant

14. Structures of the Large Intestine Slide 14.30a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Cecum – saclike first part of the large intestine  Appendix  Accumulation of lymphatic tissue that sometimes becomes inflamed (appendicitis)  Hangs from the cecum

15. Structures of the Large Intestine Slide 14.30b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Colon  Ascending  Transverse  Descending  S-shaped sigmoidal  Rectum  Anus – external body opening

16. Accessory Digestive Organs Slide 14.32 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Salivary glands  Teeth  Pancreas  Liver  Gall bladder