Based upon the cell type divided into EXOCRINE, ENDOCRINE and other type of cells
EXOCRINE part of the gland is usually made up of tubular acini cells which secretes zymogens
ENDOCRINE part of the gland is made up of microscopic elements called Islte of langerhans which help in the hormone production and digestion
OTHER TYPES OF CELLS
BETA CELLS-constitute about 80% of cell production
grandular and basophilic
secretes insulin
ALPHA CELLS-constitute about 20% cell production
granular and acidophilic
subtypes:ALPHA1-secretes gastrin and secretin
ALPHA2-secretes glucagon