The answer is Canada :) Hockey originated in Montreal, Canada
<span>They benefit from having the respiratory </span>system<span> give oxygen and take away carbon dioxide. Muscle </span>cells benefit<span> by having circulatory </span>system<span> bring them blood and oxygen. The heart pumps blood towards the arteries, arteries carry blood to the </span>cells<span>.</span>
They are unicellular or cell cluster microscopic organisms. And scientists use a technique called metagenomics I believe ?
