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Digestive Tract Wall
Digestive Tract Walls
| Question | Answer |
|---|---|
| What order does the layers of the digestive tract go in? (Innermost to out) | 1. Mucosa (Mucous Epithelium, Lamina Propria & Muscularis Mucosae) Submucosa Muscularis Externa Subserosa Visceral Peritoneum (Serosa) |
| Which layer: Protects the digestive tract walls, secretes & absorbs? | Mucosa |
| The Mucosa is made up of how many layers? | Three |
| The first layer of the Mucosa is? | Mucous Epithelium |
| The second layer of the Mucosa is? | Lamina Propria |
| The third layer of the Mucosa is? | Muscularis Mucosae |
| Which layer is: Composed of simple columnar epithelium of stratified squamous epithelium, goblet cells and endocrine cells? | Mucous Epithelium |
| What cells secrete mucus? | Goblet Cells |
| what cells secrete hormones into the blood? | Endocrine Cells |
| Which layer is: Composed of areolar connective tissue, blood vessels & lymphatic vessels. Provide nutrients to the Mucous Epithelium layer, distribute hormones & absorb end products of digestion from the lumen? | Lamina Propria |
| Which layer is? Made up of longitudinal & circular layers of muscle responsible for generating local movement? | Muscularis Mucosae |
| Which layer: Consists of areolar connective tissue containing blood vessels, lymphatic vessels and nerve fibers? | Submucosa |
| Which layer: Consists of smooth muscle & associated nerve fibers. The smooth muscle is responsible for movement of food by peristalsis and mechanical digestion by segmentation. | Muscularis Externa |
| Which layer is: A layer of loose areolar tissue underlying the serous coat of the intestines? | Subserosa |
| Which layer is a: Membrane that covers the Muscularis Externa, stomach, larger intestines & small intestines. The mesentery (attaches the large intestines to the rear of the abdominal wall) is an extension of this layer. | Visceral Peritoneum or Serosa |