Q: - The diaphragm contracts - The lungs expand - Air is pulled from outside the body, into the lungs - The membranes in the lungs collect oxygen molecules - Oxygen is transferred to red blood cells What might be the last step of the process?
A: Red blood cells distribute oxygen throughout the body

Q: - Acid rain enters the atmosphere and lands - Makes water acidic - Kills fish - Kills the soils in trees What might be the last step of the process?
A: Leaves are also harmed.

Q: - The kidneys receive blood through the renal artery - The blood is passed through the nephrons in the kidneys - The kidneys filter the waste from the blood - The clean blood is circulated out of the kidneys What might be the last step of the process?
A: Excess water and waste is expelled from the kidneys in the form of urine.

Q: - Food - Water enter the body - Bloodstream - Food and water enter the pancreas - The pancreas breaks down carbs What might be the last step of the process?
A:
Helps digest other foods and liquids.