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The body is not different ..... any other machine. A motorcar engine,for example, needs fuel ...... the form of petrol. It is burnt ..... the engine to produce the energy which drives the car. But petrol,gas,coal,wood or any other form ..... fuel can only burn..... the presence of oxygen. Thus, all machines and body cells are alike ...... requiring oxygen to burn their fuel and thereby producte the energy needed to perform their functions. Fuel or nutrients and oxygen are carried ...... the blood to all parts of the body.
The body is not different ..... any other machine. A motorcar engine,for example, needs fuel ...... the form of petrol. It is burnt ..... the engine to produce the energy which drives the car. But petrol,gas,coal,wood or any other form ..... fuel can only burn..... the presence of oxygen. Thus, all machines and body cells are alike ...... requiring oxygen to burn their fuel and thereby producte the energy needed to perform their functions. Fuel or nutrients and oxygen are carried ...... the blood to all parts of the body.
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The body is notdifferent FROM any other machine.
A motorcarengine,for example, needs fuel IN the form of petrol.
It is burnt INSIDEthe engine to produce the energy which drives the car.
Butpetrol,gas,coal,wood or any other form OF fuel can only burn IN the presence ofoxygen. Thus, all machines and body cells are alike BY requiring oxygen to burntheir fuel and thereby producte the energy needed to perform their functions.
Fuel or nutrientsand oxygen are carried IN the blood to all parts of the body.