Nutrients• Section 48-1 : Review on own• Carbohydrates• Proteins• Fats •Elements found in the compound• Lipids •Function of the compound• Vitamins •Examples of the compound• Minerals •Monomer of the compound• Water
Overview of Digestive SystemPlease read but do not take notes on this slide.• The digestive system consists of the alimentary canal as well as the organs and glands that contribute digestive enzymes and other products to specific portions of the canal.• In processing the food you eat, your digestive system uses mechanical and chemical methods.• Three major types of macromolecules must be broken down during digestion—carbohydrates, proteins, and lipids. – When these macromolecules are broken down sufficiently— into individual glucose monomers, amino acids, and fatty acids, respectively—those components (and water) must be absorbed into the body at the small intestine.• Wastes proceed through the large intestine, where the feces form and more water is absorbed.
Types of Digestion• Physical Digestion• Chemical Digestion• Both
Physical Digestion• Mechanical Digestion• Macromolecule is PHYSICALLY broken down into SMALLER pieces in order to increase SURFACE area to maximize ENZYME action.• Examples: – Chewing – Churning
Chemical Digestion• Digestive enzymes are involved by CHEMICALLY breaking the bonds on the macromolecules until MONOMERS are formed.• Examples: – Salivary amylase breaks down starch
Route of Digestion• Mouth• Pharynx• Esophagus• Stomach• Small intestine• Large intestine• Anus
As food directly passes through thegastrointestinal tractoralimentary canalspecific secretions that aid in digestionare released along the way.
Accessory Organs• Aids in digestion• BUT…• Food does NOT pass into these organs.• Instead these organs SECRETE fluids that will enter the alimentary canal through DUCTS.• Examples: – Liver – Pancreas – Gallbladder – Salivary Glands