Lab 7 Student Notes

Lab 7 Student Notes - Lab 7 A. Anatomy of the Digestive...

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Lab 7 Anatomy of the Digestive System (Exercise 38) A. General Histological Plan of the Alimentary Canal (tunic/layers) 1. Mucosa (mucous membrane) simple columnar (stomach thru large int.) stratified squamous (anal canal) lamina propria muscularis mucosae 2. Submucosa (connective tissue) 3. Muscularis externa 4. Serosa visceral peritoneum (adventitia outside the abdominopelvic cavity) B. Organs of the Alimentary Canal 1. Oral Cavity or Mouth - stratified squamous epithelium 2. Pharynx bolus a. nasopharynx (pseudostratified col. epith.) b. oropharynx (stratified squamous) c. laryngopharynx (stratified squamous) 3. Esophagus (10 inches) - stratified squamous - gastroesophageal sphincter - mucus producing and peristalsis 4. Stomach (simple columnar epithelium) - cardiac region (and cardiac “sphincter”) - fundus - body (corpus) - pyloric region - antrum (pyloric antrum) - pyloric sphincter - lesser and greater curvatures - temporary storage region - muscularis has 3 layers - longitudinal layer (outer layer) - circular layer - oblique layer (inner layer) - rugae - gastric pits - chief cells
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Lab 7 Student Notes - Lab 7 A. Anatomy of the Digestive...

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