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Anatomy and Physiology
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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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AAM @I
Transcribed Image Text:AAM @I
The digestive tract from the esophagus to the large intestine is made up of the same 4 basic tissue layers or tunics. 1. Mucosa (Mucous Membrane) The mucosa is the innermost layer and in the GI tract it is made of 3 sublayers: a. Epithelium b. Lamina propria c. Muscularis mucosa 2. Submucosa The submucosa in the GI tract it is made of connective tissue, blood vessels, lymphatic vessels, glands, and the submucosal nerve plexus. 3. Muscularis Externa The muscularis externa in the GI tract is made of 2-3 layers of skeletal or smooth muscle and the myenteric nerve plexus. 4. Adventitia or Serosa The outermost layer is made of connective tissue and epithelial tissue. If the digestive organ is OUTSIDE the abdominopelvic cavity or it retroperitoneal (located behind the parietal peritoneum), than the layer is called ADVENTITIA. Otherwise, the layer is called SEROSA (= visceral peritoneum) In today's lab we will examine these layers using anatomical models and microscope slides. Before you begin, practice identifying the 4 major layers and the 3 sublayers of the mucosa in the image below: Color the layers if that helps you. DAY Focus 1
Transcribed Image Text:The digestive tract from the esophagus to the large intestine is made up of the same 4 basic tissue layers or tunics. 1. Mucosa (Mucous Membrane) The mucosa is the innermost layer and in the GI tract it is made of 3 sublayers: a. Epithelium b. Lamina propria c. Muscularis mucosa 2. Submucosa The submucosa in the GI tract it is made of connective tissue, blood vessels, lymphatic vessels, glands, and the submucosal nerve plexus. 3. Muscularis Externa The muscularis externa in the GI tract is made of 2-3 layers of skeletal or smooth muscle and the myenteric nerve plexus. 4. Adventitia or Serosa The outermost layer is made of connective tissue and epithelial tissue. If the digestive organ is OUTSIDE the abdominopelvic cavity or it retroperitoneal (located behind the parietal peritoneum), than the layer is called ADVENTITIA. Otherwise, the layer is called SEROSA (= visceral peritoneum) In today's lab we will examine these layers using anatomical models and microscope slides. Before you begin, practice identifying the 4 major layers and the 3 sublayers of the mucosa in the image below: Color the layers if that helps you. DAY Focus 1
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