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SMALL Intestine

Microanatomy of

QuestionAnswer
What are the subparts of the microanatomy of the Small Intestine? 1. Plicae Circularis; 2. Villi; 3. Intestinal Glands; 4. Goblet Cells; 5. Tunica
What are the Plicae Circularis? Circular Folds - increase surface area
What are Villi? VASCULAR projections from the Tunica Mucosa - improve absorption
What is the function of Intestinal Glands? secrete Digestive Enzymes
What is the function of Goblet Cells within the Small Intestine? secrete Mucus to PROTECT Epithelial Cells
What are the layers of the Tunica of the Small Intestine from the inside --> outside? 1. Tunica Mucosa; 2. Tunica Submucosa; 3. Tunica Muscularis; 4. Tunica Serous
What are the layers of the Tunica Mucosa of the Small Intestine? 1. Simple Columnar Epithelium; 2. Lamina Propria; 3. Muscularis Mucosa
What is Lamina Propria and where is it found? the underlying Connective Tissue with Blood Capillaries and Lacteals - 2nd layer of Tunica Mucosa
What is the composition of the Muscularis Mucosa and where is it located? Smooth Muscle - 3rd layer of the Tunica Mucosa
What is the 1st layer of the Tunica Mucosa? Simple Columnar Epithelium
What is the histology of the Tunica Mucosa? Mucous Membrane
What is the histology of the Tunica Submucosa? Areolar Tissue
What is the Tunica Submucosa? longitudinal group of Vessels, Nerves Lymphatics
What is the histology of the Tunica Muscularis? Smooth Muscle
What are the sub-layers of the Tunica Muscularis? 1. Circular Layer (slinky); 2. Longitudinal Layer (straight)
What is the function of the Tunica Muscularis? contributes to GI Peristalsis - shortening & squeezing motion
What is the histology of the Tunica Serous? Simple Squamous Epithelium & Connective Tissue
What is the function of the Tunica Serous? OUTERMOST - Supportive layer - AKA Visceral Peritoneum
Created by: kristel387
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