Verified Answer :

brittanycandace

All of our systems need to not only work together but they all depend on one another. Each of the systems has a certain job to do. For example, Your respiratory system (lungs) provides air and you need air to live. 

all the system all come into as 1 and help each other like team work
also they help each other like family

if you put them all together as one they are united

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