Salma Ahmed
English Lit. GCSE Student
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Could excercise be doing any damage?
- Words:
- 1568
- Submitted:
- Fri Jun 19 2009
- Mark submitted by Author:
Have a little read: ... We are told to 'get more exercise'. Walking, cycling or going to the gym are recommended, but do they really exercise your heart? Could it be doing any damage? As our heart is a muscle, the more it contracts, the more exercise it gets. To provide our body with energy, our body has to perform the process of respiration. This is a chemical reaction which uses the reactants Oxygen and Glucose to release high amounts of energy that can be used to make our muscles contract. Glucose + Oxygen --> Carbon Dioxide + Water Our body receives the glucose used in the reaction from the food we eat. The food is digested in the stomach and then the digest remains enter the small intestine. The small intestine has thin walls so that the glucose and other nutrients from the digested food can diffuse from the intestine into the plasma of the blood. Diffusion is
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