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Layers of the AC

QuestionAnswer
4 Layers of the AC 1. Mucosa 2. Submucosa 3. Muscularis Externa 4. Serosa
How many subdivisions does Mucosa have? 3
What are the 3 subdivisions of Mucosa? 1. Epithelium 2. Lamina Propria 3. Muscularis Mucosae
Epithelium layer of the Mucosa Tissue type Stratified squamous ET in the mouth, oropharynx, laryngopharynx, esophagus, and anus Simple columnar ET in rest of canal!!
Lamina Propria layer of the Mucosa Tissue type Areolar CT with blood vessels; many lymphoid follicles, especially as tonsils and mucosa-associated lymphoid tissue (MALT)
Muscularis layer of the Mucosa Tissue type A thin layer of smooth muscle!
Mucosa Major Functions Secretion of mucus, digestive enzymes, and hormones; absorption of end products into blood. protection against infectious disease
Submucosa Tissue Type Areolar and dense CT containing blood vessels, lymphatic vessels, and nerve fibers
Submucosa Major Functions Blood vessels absorb and transport nutrients, elastic fibers help maintain the shape of each organ
How many subdivisions does Muscularis have? 2
What are the 2 subdivisions of Muscularis? 1. Circular Layer 2. Longitudinal Layer
Muscularis Circular Layer Tissue type Inner layer of smooth muscle
Muscularis Longitudinal Layer Tissue type Outer layer of smooth muscle
Muscularis Major Functions Segmentation and peristalsis of digested food along the tract are regulated by the myenteric nerve plexus
What are the 2 subdivisions of Serosa? 1. CT 2. ET
Serosa CT Tissue Type Areolar CT
Serosa ET Tissue Type Simple squamous ET
Serosa Major Functions Reduces friction as the digestive system organs slide across one another
Created by: liladdoyle
 

 



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