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    - How the concentration gradients of O2 and CO2 are maintained in the lungs and active muscle tissues
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    (Original post by satykaur26)
    - How the concentration gradients of O2 and CO2 are maintained in the lungs and active muscle tissues
    I've moved this to the appropriate forum where hopefully you'll get more responses. If this hasn't been answered I will try and help you this evening.
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    (Original post by satykaur26)
    - How the concentration gradients of O2 and CO2 are maintained in the lungs and active muscle tissues
    The main things you need to talk about are gaseous exchange mechanisms in the alveoli (lungs) and the capillaries (muscle tissue). You can mention that the heart pumps deoxygenated blood into the lungs, while your lungs are currently breathing in oxygen and the deoxygenated blood contains a high concentration of CO2. The oxygen is continuously coming in to the lungs from the air, and the CO2 is constantly being produced by the cells in your body.

    While the muscles are always taking up oxygen from the blood (which has been taken in through the lungs), there will be a high concentration of oxygen in the capillaries waiting to be taken up by muscle tissue. Since all the cells are always respiring in your body, they will be continuously producing and wanting to get rid of CO2 as a waste product. The CO2 will be released into the capillaries and taken up by the blood, while the oxygen is transferring in the other direction.
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    thanks
 
 
 
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