Please enable JavaScript.
Coggle requires JavaScript to display documents.
Digestion and Absorption (Mouth (After swallowing, the food is called a…
Digestion and Absorption
- After swallowing, the food is called a bolus
-
- Involves: Mastication (the simulation of taste buds and swallowing)
- The oesophagus leads the bolus to the stomach
-
- Salivary amylase initiates digestion of carbohydrates
-
Carbohydrates: Digestion (by salivary α amylase continues) until enzyme is inactivated by stomach acids
-
-
4. Large Intestine
It absorbs water, vitamins and any remaining absorbable nutrients
Bacteria ferment material, and produce beneficial metabolites that are reabsorbed
-
-
Sphincter Muscles
Upper Oesophageal Sphincter: During a swallow, the upper oesophageal sphincter opens. The bolus slides down.
Lower Oesophageal Sphincter: The lower oesophageal sphincter closes behind the bolus so it doesn’t slip back up the oesophagus.
Pyloric Sphincter: The stomach release the chyme through the pyloric muscle which ones the small intestine.
Ileocecal Valve: The remaining contents arrive at this value located at the beginning of the large intestine.
Pancreas:
- Bicarbonate neutralises acidic gastric fluids.
- Pancreatic enzymes break down carbohydrates, fats, and proteins.
Digestion vs Absorption
Absorption: The uptake of nutrients by the cells of the small intestine for the transport into either the blood or the lymph.
-