Stage 1: Fill
bottom of lungs;
abdomen
expands. |
Stage 2:
Fill
middle third of
lungs; chest
cavity expands. |
Stage 3: Fill
top third of
lungs;
shoulders lift.. |
Stage 1: Top
third of lungs
empties first,
shoulders
relax. |
Stage 2: Chest
cavity contracts,
pushing air out
of middle third
of lungs. |
Stage 3: Abdomen
is pulled in, forcing
all remaining air
out of lungs. |