Major Digestive Glands 1 Salivary Glands a Saliva produced and increased by parasympathetic nervous system i Saliva Function 1 Cleans mouth 2 Dissolves food allows taste 3 Breakdown of food with enzymes 4 Aids compaction of food into bolus 2 Pancreas 3 Liver a Delivers to duodenum 4 Gall Bladder a Production of bile by hepatocytes b Store fat c Role in detoxification a Thin walled muscular green sac b Stores bile i Bile delivered from liver Salivary Gland Histology Capsule with septa o Lobes o Lobules Secretory units o Serous cells o Mucous cells Secretions of proteins and polysaccharides Mucous secretions o Myoepithelial cells Cytoplasmic portion rich in myosin and actin Contract to release saliva secretions Blood vessels Nerves Branched ducts o Intercalated and Striated ducts Pancreas Histology Dual Gland o Endocrine Islets of Langerhans Insulin Glucagon Richly vascularized o Exocrine Secretory acini Produces enzymes Cenracinar cells in lumen form beginning of duct Liver Histology Falciform Ligament o Mesentery that suspends liver from diaphragm Round ligament Capsule o Fibrous remnant of fetal umbilical vein o Dense irregular C T o Simple Squamous epithelium Hepatocytes Plates of liver cells o Produce bile o Process blood borne nutrients o Stores fat o Role in detoxification Kupffer cells o Macrophages Bile canaliculi o Small canals for bile Liver sinusoids o Leaky capillaries Gall Bladder Histology Epithelium o Simple columnar o Clear and Brush cells o Vascularized Areolar C T Lamina propria Smooth muscle Serosa o Dense irregular c t o Simple Squamous Definitions Salivary gland Bolus A rounded mass Myoepithelial Cells Made of myosin and actin fibers that act as muscles o Contract to release salivary secretions in salivary gland Buccal Glands Small intrinsic salivary glands Liver Exocrine Secretion Bile o Fluid secreted by liver Hepatocytes Plates of liver cells o Radiate around central vein Bile Canaliculi Small canals for bile Gall Bladder Gallstones Crystallized cholesterol