Chapter 14 The Digestive System and Body Metabolism Pages

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Chapter 14 The Digestive System and Body Metabolism Pages 455-458 Essentials of Human Anatomy & Physiology Seventh Edition Elaine N. Marieb Chapter 14 The Digestive System and Body Metabolism Pages 455-458 Slides 14.1 – 14.14 Lecture Slides in PowerPoint by Jerry L. Cook Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

The Digestive System and Body Metabolism Digestion Breakdown of ingested food Absorption of nutrients into the blood Metabolism Production of cellular energy (ATP) Constructive and degradative cellular activities Slide 14.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Organs of the Digestive System Two main groups Alimentary canal – continuous coiled hollow tube Accessory digestive organs Slide 14.2a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Organs of the Digestive System Figure 14.1 Slide 14.2b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Organs of the Alimentary Canal Mouth Pharynx Esophagus Stomach Small intestine Large intestine Anus Slide 14.3 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Mouth (Oral Cavity) Anatomy Lips (labia) – protect the anterior opening Cheeks – form the lateral walls Hard palate – forms the anterior roof Soft palate – forms the posterior roof Uvula – fleshy projection of the soft palate Figure 14.2a Slide 14.4 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Mouth (Oral Cavity) Anatomy Vestibule – space between lips externally and teeth and gums internally Oral cavity – area contained by the teeth Tongue – attached at hyoid and styloid processes of the skull, and by the lingual frenulum Figure 14.2a Slide 14.5 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Mouth (Oral Cavity) Anatomy Tonsils Palatine tonsils Lingual tonsil Figure 14.2a Slide 14.6 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Pharynx Anatomy Nasopharynx – not part of the digestive system Oropharynx – posterior to oral cavity Laryngopharynx – below the oropharynx and connected to the esophagus Figure 14.2a Slide 14.8 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Esophagus Runs from pharynx to stomach through the diaphragm Conducts food by peristalsis (slow rhythmic squeezing) Passageway for food only (respiratory system branches off after the pharynx) Slide 14.10 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Layers of Alimentary Canal Organs Mucosa Innermost layer Moist membrane Surface epithelium Small amount of connective tissue (lamina propria) Small smooth muscle layer Slide 14.11a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Layers of Alimentary Canal Organs Submucosa Just beneath the mucosa Soft connective tissue with blood vessels, nerve endings, and lymphatics Slide 14.11b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Layers of Alimentary Canal Organs Muscularis externa – smooth muscle Inner circular layer Outer longitudinal layer Serosa Outermost layer – visceral peritoneum Layer of serous fluid-producing cells Slide 14.12 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Layers of Alimentary Canal Organs Figure 14.3 Slide 14.13 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings