Major Digestive Glands1. Salivary Glandsa. Saliva produced and increased by parasympathetic nervous systemi. Saliva Function:1. Cleans mouth2. Dissolves food + allows taste3. Breakdown of food with enzymes4. Aids compaction of food into bolus2. Pancreasa. Delivers to duodenum3. Liver a. Production of bile by hepatocytesb. Store fatc. Role in detoxification4. Gall Bladdera. Thin-walled muscular green sacb. Stores bilei. Bile delivered from liverSalivary Gland: Histology- Capsule with septao Lobes o Lobules- Secretory unitso Serous cells Secretions of proteins and polysaccharides o Mucous cells Mucous secretions o Myoepithelial cells Cytoplasmic portion rich in myosin and actin Contract to release saliva secretions- Blood vessels + Nerves - Branched ductso Intercalated and Striated ductsPancreas: Histology- Dual Glando Endocrine Islets of Langerhans  Insulin + Glucagon Richly vascularizedo Exocrine Secretory acini Produces enzymes Cenracinar cells in lumen form beginning of ductLiver: Histology- Falciform Ligamento Mesentery that suspends liver from diaphragm- Round ligament o Fibrous remnant of fetal umbilical vein- Capsuleo Dense irregular C.To Simple Squamous epithelium- Hepatocytes: Plates of liver cellso Produce bileo Process blood borne nutrientso Stores fato Role in detoxification - Kupffer cellso Macrophages- Bile canaliculio Small canals for bile- Liver sinusoidso Leaky capillariesGall Bladder: Histology- Epitheliumo Simple columnaro Clear and Brush cells- Lamina propriao Vascularized Areolar C.T- Smooth muscle- Serosa o Dense irregular c.to Simple SquamousDefinitions: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 glandsLiver- Exocrine Secretion: Bileo Fluid secreted by liver- Hepatocytes: Plates of liver cellso Radiate around central vein- Bile Canaliculi: Small canals for bile Gall Bladder- Gallstones: Crystallized