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Sagot :
-One example could be circulation systems. Circulation systems, especially regarding animals, help to circulate oxygen as well as nutrients to cells in the body and expels waste.
-For example, the human heart has one side to pump oxygenated blood and a second side to pump deoxygenated blood.
If this doesn’t work you could mention solar systems, in which planetary bodies orbit the sun via gravitational pull
-For example, the human heart has one side to pump oxygenated blood and a second side to pump deoxygenated blood.
If this doesn’t work you could mention solar systems, in which planetary bodies orbit the sun via gravitational pull
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