How to calculate your body age<br>Find your resting pulse rate. The heart is one of the body's most important organs, and a well conditioned and healthy heart is a big part of overall well-being. A normal heart usually beats at between 60-100 times per minute.
A normal heart usually weighs about 2.5 lbs.
( z1 weigh :ARG1 ( z2 heart :ARG1-of ( z3 normal ) ) :ARG3 ( z4 about :op ( z5 mass-quantity :quant "2.5" :unit ( z6 pound ) ) ) :mod ( z7 usual ) )