AS level PE. Respiratory system. Discus mechanics of breathing Inspiration Expiration Air is distributed to the lungs by way of the Trachea Primary bronchi (Also secondary/tertiary) Bronchioles alveoli. Respiratory system – 3 main processes. Pulmonary respiration
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-- by product – CO2
CO2 travels in blood as carbonic acid (70%),
Carbaminohaemoglobin(20%) & 7% plasma
BOTH EXTERNAL & INTERNAL RESPIRATION INCREASE DURING EXERCISE IN ORDER TO INCREASE THE SUPPLY OF O2 TO THE WORKING MUSCLES