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7 Cards in this Set
- Front
- Back
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what are the overall functions of the digestive system? |
ingestion, mechanical processing & digestion, chemical digestion, secretion, absorption, excretion |
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what structures are part of the digestive tract & which ones are accessory structures? |
structures: oral cavity, pharynx, esophagus, stomach, small intestine, large intestine |
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what's mechanical processing? |
after the food's been chewed and mixed with saliva, it's swallowed and pushed through the digestive system. |
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what's chemical digestion? |
the breakdown of food & its nutrients with the use of enzymes. |
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describe the 4 layers of the digestive tract |
1. mucosa (lamina propria & epithelium): inner layer that lines digestive tract. 2. submucosa: dense irregular connective tissue 3. muscularis externa: smooth muscle arranged in circular & longitudinal layers 4. serosa: serous membrane that covers muscularis externa (outer layer) |
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define mesentery, lesser & greater omentum, falciform ligament |
mesentery: sheets of serous membrane that support portions of digestive tract. lesser omentum: holds stomach greater omentum: provides padding, protection, insulation & energy reserves falciform ligament: ligament that runs through liver that connects it to the abdominal wall |
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whats peristalsis & segmentation? |
peristalsis: contraction used to move food/bile/etc. forward segmentation: contraction to mix food with digestion chemicals&fluids |
