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When constructing data flow diagrams,you should show the interactions that occur between sources and sinks.
Alveoli
Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Oxygen
A chemical element essential for life, involved in cellular respiration and energy production, and a major component of the Earth's atmosphere.
Hypertonic
A solution with higher osmotic pressure (solute concentration) than another solution, leading cells to lose water.
Isotonic
A solution that has the same salt concentration as cells and blood, preventing net water movement across cell membranes.
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