nutrition & excretion. nutrition plants make their own food animals eat plants or catch other...
TRANSCRIPT
Nutrition & Excretion
NutritionPlants make their own food
Animals eat plants or catch other animals
NutrientsWhat are nutrients?
Essential substances that your body needs in order to grow and stay healthy
NutrientsSeven categories of nutrients:
CarbohydratesProteinsFatsVitaminsMineralsFibres (Roughage)Water
Carbohydrates are sugars and starches that the body uses for ENERGY!
They come from PLANTS
Carbohydrates
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Simple CarbohydratesSugars give you a quick but short BOOST of energy
Found in oranges, milk, cookies, candy
Starches are many sugars linked together
They give long-term energy.
Found in Rice, Bread, Pasta, Potato
Foods with LOTS of starch: rice, potatoes, bread, pasta, beans
Complex Carbohydrates
Protein
• Proteins are long chains of amino acids
• They are needed for Growth and Repair
• Found in meat, eggs, fish
Functions: It is a source of
ENERGY Insulate the body Found in Cheese,
butter and oil
Fat
VitaminsVitamins are important to keep your body healthy
You need only a little bit of them
Found in Fruit
MineralsMinerals are very small molecules needed for many processes in your body
Some Important MineralsCalcium Iron Iodine
Fibres (Roughage)• Important for easy defecation• Shortage causes Constipation• Found in fruits and vegetables, grains
WaterYou are made of 70-
80% WaterWithout it you will
dehydrateFound in almost
anything
Healthy diet
Healthy diet
DigestionDigestion is the
breakdown of large molecules (starch, protein, fat) into smaller molecules so they can be absorbed into your blood
It takes place in your digestive system
DigestionName the
parts
NutritionImportant follow up
Ingestion -> Digestion -> Absorption -> Egestion
After Absorption your nutrition is used in Respiration to produce ENERGY
ExcretionGetting rid of Waste
Urine contains protein-waste, salt and water
Sweat contains salt and water
Breath contains carbondioxide
Poo-ing is not Excretion but Egestion
Thank you