SALIVARY GLANDS: PAROTID, SUBMANDIBULAR AND SUBLINGUAL GLANDS, BUCCAL GLANDS SEROUS SECRETION (PTYALIN) MUCUS SECRETION (MUCIN) GASTRIC SECRETION OXYNTIC GLANDS AND PYLORIC GLANDS SECRETIONS FROM OXYNTIC GLANDS HYDROCHLORIC ACID, PEPSINOGEN, INTRINSIC FACTOR AND MUCUS SECRETIONS FROM PYLORIC GLANDS MUCUS, GASTRIN

1. SECRETORY FUNCTIONS
SALIVARY GLANDS: PAROTID, SUBMANDIBULAR AND SUBLINGUAL
GLANDS, BUCCAL GLANDS
SEROUS SECRETION (PTYALIN)
MUCUS SECRETION (MUCIN)
GASTRIC SECRETION
OXYNTIC GLANDS AND PYLORIC GLANDS
SECRETIONS FROM OXYNTIC GLANDS
HYDROCHLORIC ACID, PEPSINOGEN, INTRINSIC FACTOR AND MUCUS
SECRETIONS FROM PYLORIC GLANDS
MUCUS, GASTRIN

2. OXYNTIC (GASTRIC) GLANDS
MUCOUS NECK CELLS
PEPTIC (CHIEF) CELLS
PARIETAL (OXYNTIC) CELLS
GASTRIC BARRIER
TIGHT JUNCTION B/W ALKALINE MUCUS AND
EPITHELIA CELLS, PREVENT BACK LEAK OF ACID
ACTIVATION OF PEPSINOGEN
ACTIVE PEPSIN IN A HIGHLY ACIDIC MEDIUM
INTRINSIC FACTOR: ABSORPTION OF VIT B12
CHRONIC GASTRITIS (ACHLORHYDRIA,
PERNICIOUS ANEMIA)

3. PYLORIC GLANDS
FEW PEPTIC AND NO PARIETAL CELLS
 MUCOUS CELLS: MUCUS FOR LUBRICATION & PROTECTION OF
STOMACH WALL FROM DIGESTION BY GASTRIC ENZYMES
SECRETE HORMONE GASTRIN
STIMULATION OF GASTRIC ACID SECRETION
PARIETAL CELLS CLOSELY WITH ENTEROCHROMAFFIN LIKE CELLS
SECRETE HISTAMINE
ECL: STIMULATED BY HORMONE GASTRIN, RELEASE HISTAMINE INTO
DEEP OXYNTIC GLAND (HCl SECRETION)

4. PANCREATIC SECRETION
LARGE COMPOUND GLAND
DIGESTIVE ENZYMES:
PANCREATIC ACINI
SODIUM BICARBONATE
SOLUTION: DUCTULES AND
DUCTS
COMBINED PRODUCT AT
PAPILLA OF VATER

5. PANCREATIC DIGESTIVE ENZYMES
PROTEINS
TRYPSIN, CHYMOTRYPSIN, CARBOXYPOLYPEPTIDASE
CARBOHYDRATES
PANCREATIC AMYLASE
FATS
PANCREATIC LIPASE
CHOLESTEROLESTERASE
PHOSPHOLIPASE

6. PROTEOLYTIC DIGESTIVE ENZYMES
TRYPSINOGEN, CHYMOTRPSINOGEN, PROCARBOXYPOLYPEPTIDASE
TRYPSIN INHIBITOR PREVENT DIGESTION OF PANCREAS:
CYTOPLASM OF GLANDULAR, PREVENT ACTIVATION OF PROTEOLYTIC
ENZYMES
ACUTE PANCREATITIS
PANCREATIC DUCT BLOCKED, ACTIVITY OF TRYPSIN INHIBITOR LACK,
PANCREATIC SECRETIONS ACTIVATED, DIGEST ENTIRE PANCREAS

7. SECRETION OF BILE
FUNCTIONS OF BILE
FAT DIGESTION AND ABSORPTION
EXCRETION OF SEVERAL IMPORTANT WASTE PRODUCTS FROM BLOOD
(BILIRUBIN, CHOLESTEROL)
BILE ACIDS EMUSIFY LARGE FAT PARTICLES INTO MANY MINUTE
PARTICLES
BILE SALTS AID IN ABSORPTION OF DIGESTED FAT END PRODUCTS
THROUGH INTESTINAL MUCOSAL MEMBRANE

8. SECRETIONS OF SMALL INTESTINE
BRUNNER'S GLANDS: COMPOUND MUCOUS GLANDS
SMALL PITS CALLED CRYPTS OF LIEBERKUHN
EPITHELIUM: GOBLET CELL (MUCUS)
ENTEROCYTES (WATER AND ELECTROLYTES)
ENTEROCYTES OF VILLI
SEVERAL PEPTIDASES
FOUR ENZYMES (SUCRASE, MALTASE, ISOMALTASE AND LACTASE)
INTESTINAL LIPASE

9. SECRETIONS OF LARGE INTESTINE
CRYPTS OF LIEBERKUHN
MUCUS CELL, NON- MUCUS CELL SECRETE BICARBONATE IONS
EPITHELIAL CELLS ARE INTENSLY IRRITATED (BACTERIAL INFECTION)
EXTRA LARGE QUANTITIES OF WATER , ELECTROLYTES WITH VISCID
ALKALIN MUCUS
DIARRHEA WITH LOSS OF WATER AND ELECTROLYTES