NutritionImportant Concepts2.1Classes of FoodQuick Refresh2.2Importance of A Balanced DietQuick Refresh2.3Human Digestive SystemQuick Refresh2.4Absorption of the Products of DigestionQuick Refresh2.5Reabsorption of Water and DefaecationQuick Refresh1 Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Nutrition2.6Healthy Eating HabitsQuick RefreshSmart Review2 Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Important Concepts3 Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Classes of FoodChapter2.14Supply energy to the body needs that carry out daily activitiesCarbohydrate contain carbon, hydrogen and oxygen atomsRice, bread, potato, sugar and glucoseSugar, cellulose and starch are types of carbohydrates Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of FoodBuild new cells and repair damaged tissues in the bodyProtein contain carbon, hydrogen, oxygen and nitrogen atoms5Meat, fish, eggs, beans, milk and nutsMillions reagent Reagent used to test protein Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of FoodProvide energyFat contain carbon, hydrogen and oxygen atoms6Groundnut, coconut oil, butter, palm oil, fish oil, chicken skinActs as insulator to reduce heat loss from the bodyHelps the body to digest and absorb vitamins A, D, E and K Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of FoodVitamins are needed in small quantities by the body7BLiver, yeast, milkFor healthy nervesBeri-beriCCitrus fruits andgreen vegetablesIncrease immunity todiseasesAnaemiaVitamins are classified into two groups(a)Vitamins soluble in water vitamin B and C Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of Food(b)Vitamins soluble in fat vitamin A, D, E and K8AEggs, milk, carrotFor healthy eyesNight blindnessDEgg yolks, fish oil,milkFor the growth of strongteeth and bonesRicketsEEggs, palm oil, milk,liverFor healthy reproductivesystemSterilityKTomato, eggs,green vegetablesHelps in blood clottingSlow bloodclotting Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of FoodMineral salts are needed in small quantities by the body9PhosphorusMilk, fish, eggs,green vegetablesTo forms strong teethand bonesRicketsCalciumCheese, milk,green vegetablesBuild strong teeth andbonesRicketsIronLiver, meat, milk,green vegetablesProduces haemoglobinin red blood cellsAnaemiaIodineSea food such asfish and prawnsProper functioning ofthyroid glandGoiterHelps in blood clotting Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of FoodHelps to stimulate peristalsis and the muscle movement of the small and bigintestinesFibre, such as cellulose that found in food substances and is difficult to digest10Fruits and vegetables Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Chapter2.1Classes of FoodHelps to dissolve many types of substances in the bodyIn daily, 6 to 8 glasses of water is needed by the body11Drinking water, fruits and vegetablesHelps to maintain a constant body temperatureHelps to get rid of waste substances like urea and carbon dioxide from the bodyHelps to keep the body cells turgidAs a medium that allows biochemical reaction to occur in the bodyControlling the concentration of bloodAct as a lubricantHelps in transporting food during digestion Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition

Quick RefreshFood is the main source energy for all living things

Food is needed to(a)provide energy for carrying out daily work(b)repair damaged tissues in the body(c)build new cells(d)build healthy body

Protein deficiency can cause kwashiorkor in childhood

Vitamin A, D, E and K are soluble in fat

Vitamin B and C are soluble in waterQ.R.2.112 Amazing Tunas Enterprise (001573407-U)TRG Science Form 2Chapter 2 : Nutrition