 The cephalic movement of peritoneal fluid is augmented by the negative intra-abdominal pressure during
exhalation and bowel peristaltic motion.Initially, peritoneal fluid accumulates in gravity-dependent spaces, the deep recesses of the pelvis and the lateral
paravesical spaces and then ascends cephalad through the paracolic gutters reaches the subdiaphragmatic spaces.As
the left paracolic gutter is shallow and discontinuous with left subdiaphragmatic space at the phrenicocolic ligament,
most of the fluid takes path through the right paracolic gutter.