If the unit of pressure is Pa or N/m2, why the blood
pressure or the lung pressure is messured in "mm of Hg"
or "centimeters of water" respectively ?

Answer Posted / karthick

pressure intensity can be measured by using the height from
the datum line multiplied by the specific weight.

p=w.h

so pressure also is dependent on height(obviously height
can be measured in cms) thats it

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