DIGESTIVE SYSTEM
DIGESTIVE SYSTEM
Digestion is a process of breaking down complex food molecules into simple ones, suitable for absorption and their subsequent utilization in our body
PURPOSE
to convert complex food molecules into simpler ones, suitable for absorption and utilization production of energy, necessary for survival & vital chemical activity growth & development of the body repairing function reproductive function lactation FUNCTION to keep the mouth moist, required for talking & swallowing of food intake of food digestion secretion of digestive juices from various glands absorption of water, vitamins, minerals absorption of digestive end products of carbohydrates, proteins, fats water balance acid-base balance electrolyte balance maintenance of blood sugar level production of RBC
DIGESTIVE SYSTEM
ACCESSORY DIGESTIVE SYSTEM mouth teeth tongue liver oropharynx Gall-bladder oesophagus pancreas stomach Digestive glands small intestine
large intestine, anal canal
SALIVARY GLANDS
1. Parotid
2. Submaxillary
3. Sublingual
3 pairs of salivary glands
FUNCTION
to keep the mouth moist, required for talking & swallowing of food prepare the food substance into bolus, suitable for digestion helps in the taste of food substance swallowing digestion of carbohydrates to maltose & isomaltose prevents microbial growth in the mouth lubricating function excretion of heavy metals, toxic substances, drugs buffering capacity electrolyte balance water balance
STOMACH
1. cardiac-mucus
2. pyloric- mucin , gastrin
3. body & fundus- chief cells- pepsinogen, rennin parietal cells- HCL, intrinsic factor enterrochromatin cells- serotonin
FUNCTIONS digestive function helps in the digestion of proteins & some fat excretory function bacteriolytic function-gastric HCl kills bacteria mucus protects the GI mucosa from HCl
water
Digestion is a process of breaking down complex food molecules into simple ones, suitable for absorption and their subsequent utilization in our body
PURPOSE
to convert complex food molecules into simpler ones, suitable for absorption and utilization production of energy, necessary for survival & vital chemical activity growth & development of the body repairing function reproductive function lactation FUNCTION to keep the mouth moist, required for talking & swallowing of food intake of food digestion secretion of digestive juices from various glands absorption of water, vitamins, minerals absorption of digestive end products of carbohydrates, proteins, fats water balance acid-base balance electrolyte balance maintenance of blood sugar level production of RBC
DIGESTIVE SYSTEM
ACCESSORY DIGESTIVE SYSTEM mouth teeth tongue liver oropharynx Gall-bladder oesophagus pancreas stomach Digestive glands small intestine
large intestine, anal canal
SALIVARY GLANDS
1. Parotid
2. Submaxillary
3. Sublingual
3 pairs of salivary glands
FUNCTION
to keep the mouth moist, required for talking & swallowing of food prepare the food substance into bolus, suitable for digestion helps in the taste of food substance swallowing digestion of carbohydrates to maltose & isomaltose prevents microbial growth in the mouth lubricating function excretion of heavy metals, toxic substances, drugs buffering capacity electrolyte balance water balance
STOMACH
1. cardiac-mucus
2. pyloric- mucin , gastrin
3. body & fundus- chief cells- pepsinogen, rennin parietal cells- HCL, intrinsic factor enterrochromatin cells- serotonin
FUNCTIONS digestive function helps in the digestion of proteins & some fat excretory function bacteriolytic function-gastric HCl kills bacteria mucus protects the GI mucosa from HCl
water