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What are the layers of the digestive system, starting from the lumen?
- 1. mucosa layer
- 2. submucosa layer
- 3. muscularis layer
- 4. serosa layer
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mucosa layer
single layer of epithelial cells
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submucosa layer
blood vessels, lymph vessels, and nerves
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muscularis layer
smooth muscle (peristalsis)
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serosa layer
thick protective membrane
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What are the parts of the small intestines?
- 1. Duodenum
- 2. Jujenum
- 3. Ileum
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What are the parts of the large intestines?
- Caecum
- Ascending colon
- Transverse colon
- Descending colon
- Sigmoid colon
- Rectum
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saliva
- Salivary amylase
- Moistens food to facilitate swallowing
- Lysozymes
- Dissolves food to enhance taste buds
- Aids in speech
- Neutralizes acid
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folds of the stomach
rugae
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gastric pits
- Found in the mucosa layer
- Consists of mucosa cells, chief cells, and parietal cells
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mucosa cells
mucus and bicarbonate
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parietal cells
hydrochloric cells and intrinsic factor
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