Presentation on theme: "DIGESTIVE SYSTEM Chapter 3. Digestion is the mechanical and chemical breaking down of food into smaller components, to a form that can be absorbed, for."— Presentation transcript:
Digestion is the mechanical and chemical breaking down of food into smaller components, to a form that can be absorbed, for instance, into a blood stream. Digestion is a form of catabolism; a break-down of macro food molecules to smaller ones. componentsabsorbedblood streamcatabolism
Responsible for the intake, digestion of food, absorption of nutrients, and elimination of solid waste. Alimentary Canal (GI tract) Aliment/o - to nourish Anatomy/Physiology
Functions – production of bile – glucose - glycogen – storage of vitamins, B12, A, D, E, K – erythrocytolysis (pigment released eliminated in bile called bilirubin) – bilirubin gives stool its characteristic dark color – removes toxins from blood – manufactures blood proteins Liver - hepat/o
Gallbladder pear-shaped sac under the liver chol/e means bile or gall cyst/o means cyst or sac gallbladder contracts forcing bile out cystic duct into common bile duct.
Bile bile is a digestive juice- emulsifier acts on fat in a way that lipid enzymes can digest fat travels via hepatic duct to cystic duct to gall bladder, where stored bile consists of water, bile salts, cholesterol, and bilirubin (a colored substance resulting from breakdown of hemoglobin) bilirubin gives bile yellow or orange color