Digestive system-1
Terms
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- Ingestion
- Putting food into the mouth; eating
- movement of the digestive system through...
- Muscular action
- Digestion
- To break down larger substances to smaller substances for absorption
- Mechanical Digestion
- Teeth cut and grind food before swallowed + smooth muscle in the stomach churns food
- Chemical Digestion
- Breakdown of large carbs, lipid protien, and acid into smaller molecules
- Absorption
- Process where digestive materials move from G.I. tract into epithelial lining of dig. tract
- Defecation
- Elimination of waste
- Major organs of Digestive system
-
Mouth
Pharynx
Esophagus
Stomach
Small intestine
Large intestine - Accessory structures of Digestive system
-
Teeth
Tongue
Salivary glands
Liver
Gallbladder
Pancreas - 4 basic tunics (layers or coats)
-
Mucosa
Submucosa
Muscullaris
Serosa - Mucosa
- mucous membrane, inner lining
- Mocosa consists of...
-
Epithelium
Lamina propria
Muscularis mucosae - Epithelium of mucosa
- Non keratinized stratified squamous; serves as a protective function: mouth pharynx, esophagus, anus
- Lamina propria of mucosa
- Always associated with mucous membrane; esp. of loose conn. tissue
- Muscularis mucosae
- Thin layer of smooth muscle fibers,causes small folds in stomach and small intestine, increseing surface area
- Submucosa
- Alveolar conn. tissue binds mucosa area to 3rd layer(muscularis)
- Muscularis
- Muscular layer in espohagus, contains skeletal muscle that produces voluntary swallowing
- Inner layer of circular muscle and Outer layer of longitudinal muscle consists of...(muscularis)
- smooth muscle
- Serosa
- Membrane (suferficial) suspends portion of G.I. tracts in abdominoevic cavity