Proteins, carbohydrates and fats as components of our nutrition. Minerals and vitamins. Nutriment entails foodstuff intake, digestion and resorption. Health through a balanced diet. Mouth, gullet and esophagus. Tooth forms. Tooth development. Tooth renewal. Milk-teeth and permanent teeth. Cavity-causing bacteria. Salivary glands: structure, location and function. Human stomach, cardia, fundus, pylorus. Function of the gastric glands. Intestine and digestion process. Location and points of support of the digestive organs. Intestine wall layers, villi, crypts, glands, fine structure of the intestinal villus. Human large intestine (colon). Digestive enzymes as organic catalysts. Constructive metabolism (anabolism) and destructive metabolism (catabolism, conversion to energy) Function of human liver and pancreas. The liver’s glandular character and its function. Affections of the pancreas , function of islets of Langerhans. Insulin and diabetes. Function of human urinary organs: kidneys, ureter and urinary bladder. Detoxification of the body by the kidneys as a fundamental, vital process. The human body water and salt budget.