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How do organisms use energy?

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Elizabeth Ribaudo

on 5 April 2011

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Transcript of How do organisms use energy?

How do organisms use energy? Life Processes All organisms carry out life processes to remain alive Ingestion The act of taking in food
Food has nutrients that allow us to grow and gives us energy Digestion Food needs to be changed before an organism uses it
Process of changing food into usable nutrients
Mouth, stomach and intestines are used by us. Cellular Respiration Organisms get energy from the food they process.
Cells use sugar from food.
When the cells need energy, sugar breaks apart and release energy.
oxygen + food = energy, water and CO2
(biproducts) Excretion Organisms must get rid of wastes
Human wastes: CO2, sweat, urine, and feces
Plant waste: glucose (sugar) and oxygen Transport Digested food must be carried around the body
Waste products must be carried away and released.
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