Fill in the blanks with correct words :
(a) Diaphragm contracts to help in `"........."` while the contraction of abdominal muscles helps in `"........."`
(b) vital capacity of trained athletes is `"........."` than that of non-athletes while the vital capacity of non- smokers is `"........."` than that of smokers.
( c) Leeches `Po_(2)` is `"........."` than the venous `Po_(2)` while arterial `Po_(2)` is `"........."` than the alveolar `Po_(2)`
( e ) The volume of air left in the lungs after a maximum expiration is called `"........."` while the volume of air breathed out during a normal restful respiration is called `"........."`