[Q]: - They expand to take the air in - The cells of the lung hold the air - They take in the air and remove the Oxygen - They inflate and all the bad air leaves through the mouth What might be the last step of the process?
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[A]: They do it all over again.

[Q]: - Kidneys filter waste out of blood - Composition of blood is regulated - Volume of water in blood is kept constant - PH is kept at a constant level - Kidneys help regulate blood pressure - Kidneys stimulate the making of red blood cells What might be the last step of the process?
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[A]: Calcium levels are maintained.

[Q]: - A satellite's need is determined - A group of people work to design a satellite capable of accomplishing the need - A team designs the physical structure of the satellite - A crew builds the physical satellite - The satellite is packed into a capsule - The satellite capsule is loaded onto a rocket What might be the last step of the process?
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[A]: The rocket is launched into space.

[Q]: - Skin is cut or damaged - Bacteria enters through the wound - The bacteria reproduces and spreads - Causes symptoms What might be the last step of the process?
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[A]:
The bacteria is either fought off or becomes a disease.