Functions of stomach:::
1. Mechanical functions::(a) it act as a reservoir of food (b) movement of the stomach helps in mixing of food with the digestive juices (c) it liquifies and propels the food further into the duodenum (mechanical digestion)
2. Secretion : it secretes gastric juice which converts food into chyme and helps in digestion
3. Antiseptic : Hydrochloric acid of gastric juice destroys microbes and prevents infection thus acting as an antiseptic
4. Digestion: Gastric juice partly digests proteins and fats
5. Absorption:Water alcohol glucose and certain drug are absorbed from the wall of the stomach vitamin B12 is also absorbed form stomach with the help of extrinsic factor
6. Excretion : it helps in the excretion of some toxins and drugs
7. Reflex functions: (a) Gastro salivary reflex causes stimulation of the salivary juice (b) Gastro iliac reflex which starts after the entry of food causes the starting of peristalsis in the lower part of the ileum (c) Gastric colic reflex produces mass peristalsis after food (d) when food is in the stomach pancreatic and biliary secretions are also stimulated
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