1. The problem statement, all variables and given/known data 100 ml blood of lung vein contains 14 ml O2. The volume of blood in the left ventricle is 70 ml. Find the amount of O2 the blood absorbs in the lung for a minute. 2. Relevant equations 100ml blood -> 14 ml O2 70 ml blood -> x 3. The attempt at a solution Here's what I did 100ml blood -> 14 ml O2 70 ml blood -> x x=9.8 ml O2 The heart beats 70 times So 9.8*70=686 ml.