The two differences you see when comparing the four chambers of the heart is that the arteries have a thicker wall and veins have thin walls and that the arteries carry oxygenated blood away from the heart which means they get more pressure than veins.
Answer:
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A population increase follows a period of scarcity.
With more people, the food and water resources get scarce, and isn't always enough for everyone.
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Is the answer computer because that can be used for both
The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.
The answer would be between b and d but i would go with d
