closed circulatory system
The economic system of the US is called Capitalism.
US system, or imperial system.
We need nutrients and oxygen to be supplied to our cells at a very fast rate as our cells need a lot of energy to keep us alive. Therefore we must have an efficient transport system to transport nutrients and oxygen to the billions of cells in our body. The transport system in man is known as the circulatory system.
the adversarial system
it is called: Free Enterprise
aliens toook a crapp an that's whut came out !
How does this question make sense. The heart allows for us to HAVE the circulatory system. The circulatory system is also known as the "transport system" without our heart (AKA the PUMP) there is no circulatory system.
The Imperial System.
A mixed economy
Aerate, fertilize soil and as decomposers.
check my answer
It was called "Segregation" in US