Together organ systems make us healthy and living.
(A) Instructions for each specific function
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Answer:
Changes in land use through time with extrapolations
Explanation:
Population data and projections are from UNDP
Answer: Four pulmonary veins.
Explanation: Oxygen and nutrient rich blood will flow from the lungs back into this part called the left atrium (Or as some will call it, the left upper chamber in the heart). From there, it goes through four pulmonary veins.
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Individual, population, community, biome, ecosystem