Loading...

BIO304: Human Physiology

Unit 12: The Digestive System   The digestive system begins in the mouth and continues through the stomach and intestines, ending at the anus. In the mouth, chemical and mechanical digestion begins. Food moves down the esophagus and into the stomach for further digestion. Next, in the small intestines final chemical breakdown and absorption occurs. What is left over after absorption moves into the large intestines, where mainly only water is absorbed. This waste material is further broken down by bacteria in the large intestines and finally leaves the body through the anus via a bowel movement. We control when we eat, but once we swallow our food, the process until fecal matter leaves the anus is involuntary. This unit discusses the steps of the digestive system from ingestion through elimination.

Unit 12 Time Advisory
This unit should take approximately 7.75 hours to complete.

☐    Subunit 12.1: 1.5 hours

☐    Subunit 12.2: 0.25 hours

☐    Subunit 12.3: 6 hours
 

☐    Reading: 1 hour

☐    Assessments: 5 hours

Unit12 Learning Outcomes
Upon successful completion of this unit, the student will be able to: - describe the structure and function of the organs of the digestive system; - describe the ingestion, digestion, absorption, and elimination and their associated organs; and - identify the disorders within the digestive system.

12.1 The Digestive System: Structures and Functions of the Organs   - Reading: Wikibooks’ Human Physiology: “The Gastrointestinal System” Link: Wikibooks’ Human Physiology: “The Gastrointestinal System” (HTML)

 Instructions: Click on the link above and read this webpage to
understand how food moves from the mouth to the stomach and then
into the intestines and finally ends at the anus. Pay close
attention to the processes of digestion and absorption.  

 Reading this section should take approximately 1 hour.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Web Media: YouTube: dannishi’s “The Digestive System” Link: YouTube: dannishi’s “The Digestive System” (YouTube)

    Instructions: Click on the link above and watch this brief video for an illustration of the structure and function of the digestive system.

    Watching this video and pausing to take notes should take approximately 15 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Web Media: YouTube: Dr. Fabian’s “Pancreas & Gallbladder” Link: YouTube: Dr. Fabian’s “Pancreas & Gallbladder” (YouTube)

    Instructions: Click on the link above and watch this video for a review of the functions of the liver, pancreas, and gallbladder.

    Watching this video and pausing to take notes should take approximately 15 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

12.2 Functions of the Digestive System: Ingestion, Digestion, Absorption, Elimination   - Web Media: YouTube: Apollo Hospitals Dhaka’s “The Stages of Digestion” Link: YouTube: Apollo Hospitals Dhaka’s “The Stages of Digestion” (YouTube)

 Instructions: Click on the link above and watch this video for a
quick overview of the digestive process.  

 Watching this video and pausing to take notes should take
approximately 15 minutes.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.

12.3 Disorders and Dysfunctions   - Reading: Wikibooks’ Human Physiology: “Conditions Affecting the Esophagus” through “Gastrointestinal Dysfunctions” Link: Wikibooks’ Human Physiology: “Conditions Affecting the Esophagus” (HTML) through “Gastrointestinal Dysfunctions” (HTML)

 Instructions: Read from “Conditions Affecting the Esophagus”
through “Gastrointestinal Dysfunctions” to learn the ways in which
the effectiveness of the gastrointestinal system can be
compromised.  

 Reading these sections should take approximately 1 hour to
complete.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Assessment: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Digestive System: Clinical Application One”, “Digestive System: Clinical Application Two”, and “Digestive System: Clinical Application Three” Link: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Digestive System: Clinical Application One” (HTML), “Digestive System: Clinical Application Two” (HTML), and “Digestive System: Clinical Application Three” (HTML)

    Instructions: Read this example of a clinical application of knowledge of digestive system physiology. Click the “Submit Answers” button at the bottom of the page for instant grading and feedback.

    Completing these assessments should take approximately 2 hours.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Assessment: McGraw Hill Online Learning Center: Stuart Ira Fox’s “Digestive System Quiz: Multiple Choice 1”, “Digestive System: Fill in the Blank”, and “Digestive System: Critical Thinking Exercises” Link: McGraw Hill Online Learning Center: Stuart Ira Fox’s “Digestive System Quiz: Multiple Choice 1” (HTML), “Digestive System: Fill in the Blank” (HTML), and “Digestive System: Critical Thinking Exercises” (HTML)

    Instructions: Click on the links above and complete thesequizzes to demonstrate your understanding of digestive system physiology. Click the “Submit Answers” button for instant grading and feedback.

    Completing these assessments should take approximately 3 hours.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.