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24 Cards in this Set
- Front
- Back
Digestive Tract
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Gastrointestinal tract
where food goes Mouth Oropharynx Esophagus Stomach Small intestine Large intestine (colon) Rectum Anus |
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Digestion
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Mechanical - breaking up food physically by biting, chewing, grinding
Chemical - breaking food down by chemical means |
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Accessory Organs
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Secrete into the digestive tract
Liver, gall bladder and pancreas secrete into the duodenum Chemical digestion takes place in the small intestines |
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Accessory Organs
Salivary Glands |
Salivary glands secrete saliva into themouth
Helps to lubricate food and has enzymes for chemical digestion |
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Digestive System
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Digestive tract
Accessory organs |
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Oral Cavity
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Mechanical processing
Moistening Mixing with salivary secretions |
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Salivary Glands
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Secretion o f lubricating fluid containing exnzymes that breakdown carbohydrates chemically
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Liver
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Secretion of bile - for lipid digestion
Storage of nutrients |
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Gall bladder
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Storage and concentration of bile
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Pancreas
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Exocrine cells - secrete digestive enzymes and buffers
Endocrine cells - secrete hormones (insulin and glucagon) |
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Large Intestines
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Dehydration and compaction of indigestible material in preparation for elimination
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Pharynx
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Muscular propulsion of materials into the esophagus
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Esophagus
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Transport of materials to the stomach
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Stomach
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Chemical breakdown of materials by acid and enzymes
Mechanical processing through muscular contractions |
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Small Intestines
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Enzymatic digestion
Absorption of water and nutrients |
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Structure of villus
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see pg. 879
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Mouth
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see pg. 883
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Salivary glands
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see pg. 884
Parotid - in front of ear Sublingual - right under tongue Submandibular - further down and more posterior than sublingual |
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Teeth
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see pg. 886
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Esophagus
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see pg. 889
Lining of mucosa (inside) is stratified squamous epithelim then lamina propria Then muscularis mucosae |
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Stomach
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Gastric pits - shallow depression that opens into the gastric surface
Base of gastric pit has mucus cells |
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Small Intestine
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Duodenum
jejunum Ileum No rugae - folds are calleed plicae circulares |
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Small Intestines
Villi |
Mucosa of the small intestines
Increases surface area for absorption Picture of villus - see pg. 900 |
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Pancreas
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see pg. 902
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