Which organ produces creatine phosphate (cp) and releases it into the bloodstream?
a. liver
b. lungs
c. pancreas
d. stomach

The liver (and the kidney) creates the creatine phosphate which is later used in the brain and skeletal muscles :) (for some extra credit points:P) 

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.