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    What did people put for the 4 mark on the respiratory system and cardiovascular system? With the cross country runner
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    How deeper and quicker breathing increased the heart rate and meant more oxygen could be delivered to working muscles so the cross-county runner could last for longer and work harder
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    I don't remember the exact question as it was a few hours ago however I think I said :"there are many ways in which the cardiorespiratory system works for Jacob. firstly, breathing rate and depth of breathing increases in order to increase the intake of oxygen into the lungs, therefore, alveoli oxygenates the blood which is then followed by increased heart therefore more blood is sent to Jacob's working muscles thus allowing him to continue running throughout the marathon due to efficient muscular contractions of the legs as a result of both the increased heart rate, stroke volume,(C.OUTPUT), breathing rate, depth and/or tidal volume for both
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    I put about both things but failed to link them properly...
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    (Original post by sooty2000)
    I put about both things but failed to link them properly...
    do you reckon that the answer I gave has linked them and synthesised them?
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    (Original post by k12ghdskp)
    do you reckon that the answer I gave has linked them and synthesised them?
    Yeah I'd say so! Sounds a good answer to me
 
 
 
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