blood flows at a high pressure, so if the arteries are thin and less muscular, the arteries can explode due to the pressure. so it needs thick and muscular properties so that it can withstand the increasing pressure of the flow of blood.
im not sure why it needs to be elastic. Hope it helped :)
Zero degrees latitude is the line designating the Equator and divides the Earth into two equal hemispheres (north and south).
Answer:
Renewable resources make cleaner energy. It takes longer to replenish renewable resources. Renewable resources are more easily located and harvested. It often costs much less to produce energy from renewable resources.
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Answer:
I think A, "Primary pollutants from a stationary source"
Explanation:
Got it right on exam :)
