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digestive system
LC Biology
| Term | Definition |
|---|---|
| Ingestion | food is taken into the alimentary canal |
| Digestion | food is broken down into smaller soluble pieces |
| Absorption | the movement of digested food from the alimentary canal into the blood system |
| Egestion | removal of unabsorbed food as feces |
| mechanical breakdown of food | teeth/ contractions in stomach wall/peristalsis |
| human teeth | incisors/canines/pre molars/molars |
| human dental formula | the number of each type of tooth in the upper jaw one side of the mouth |
| dental formula | 2(i2/2 c 1/1 pm 2/2 m 3/3) |
| oesophagus | connects larynx to stomach food moves down threw oesophagus by peristalsis |
| stomach | stores food for 4 hours |
| chyme | churns and mixes food with gastric juice |
| functions of gastric juice | mucus HCL |
| mucus | lines and protects stomach wall |
| HCL | kills bacteria in food |
| small intestine | muscular tube |
| function of small intestine | digestion and obsorption |