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Compare the movements (mixes or pushes) that occur during peristalsis and segmentation. Fill in the table below to help you practice.

Compare the movements (mixes or pushes) that occur during peristalsis and segmentation. Fill in the table below to help you practice.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Educational Explanation: Comparing Peristalsis and Segmentation** In the study of human biology, particularly the digestive system, it's essential to understand the different movements involved in processing food. Two critical processes are peristalsis and segmentation. ### Understanding the Diagram: The image contains diagrams demonstrating the movements of peristalsis and segmentation in the gastrointestinal (GI) tract. 1. **Peristalsis:** - **Diagram Description:** The illustration on the right displays a wave-like motion propelling a bolus of food through the lumen of the GI tract. This process involves a coordinated contraction and relaxation of muscles. - **Key Features:** - **Wave of Contraction:** Muscles behind the bolus contract, pushing the food forward. - **Relaxation:** The muscles in front of the bolus relax, allowing it to move smoothly. - **Function:** Peristalsis primarily pushes food and waste along the digestive tract. 2. **Segmentation:** - **Diagram Description:** The images on the left show the GI tract undergoing segmentation, characterized by rhythmic contraction and relaxation at intervals. This results in a mixing action rather than pushing. - **Key Features:** - Involves alternate contraction and relaxation of intestinal muscles. - Creates segments that mix the contents for better digestion and absorption. - **Function:** Segmentation mixes the food with digestive juices, enhancing absorption. ### Practice Table: The table below the diagrams is set up to help students practice distinguishing between peristalsis and segmentation. Students are expected to fill in: - **Name of Process:** Identify whether the movement is "Peristalsis" or "Segmentation." - **Mixes or Pushes Food/Waste?** Determine the primary function—either "Mixes" for segmentation or "Pushes" for peristalsis. This exercise is designed to aid in the visualization and understanding of the mechanical processes critical to digestion.
Transcribed Image Text:**Educational Explanation: Comparing Peristalsis and Segmentation** In the study of human biology, particularly the digestive system, it's essential to understand the different movements involved in processing food. Two critical processes are peristalsis and segmentation. ### Understanding the Diagram: The image contains diagrams demonstrating the movements of peristalsis and segmentation in the gastrointestinal (GI) tract. 1. **Peristalsis:** - **Diagram Description:** The illustration on the right displays a wave-like motion propelling a bolus of food through the lumen of the GI tract. This process involves a coordinated contraction and relaxation of muscles. - **Key Features:** - **Wave of Contraction:** Muscles behind the bolus contract, pushing the food forward. - **Relaxation:** The muscles in front of the bolus relax, allowing it to move smoothly. - **Function:** Peristalsis primarily pushes food and waste along the digestive tract. 2. **Segmentation:** - **Diagram Description:** The images on the left show the GI tract undergoing segmentation, characterized by rhythmic contraction and relaxation at intervals. This results in a mixing action rather than pushing. - **Key Features:** - Involves alternate contraction and relaxation of intestinal muscles. - Creates segments that mix the contents for better digestion and absorption. - **Function:** Segmentation mixes the food with digestive juices, enhancing absorption. ### Practice Table: The table below the diagrams is set up to help students practice distinguishing between peristalsis and segmentation. Students are expected to fill in: - **Name of Process:** Identify whether the movement is "Peristalsis" or "Segmentation." - **Mixes or Pushes Food/Waste?** Determine the primary function—either "Mixes" for segmentation or "Pushes" for peristalsis. This exercise is designed to aid in the visualization and understanding of the mechanical processes critical to digestion.
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