this reference boy is leaner than the reference man ( 13.4 versus 15.3 % of body weight ) and his fat-free body mass exhibits greater concentration of water ( 75.5 versus 73.7 % ) and lesser concentrations of potassium ( 66.8 versus 68.1 meq/kg ) and total minerals ( 4.7 versus 6.9 % ) .
C0039870
leaner
C0005910
body weight