The answer is that <span>healthy </span>legs<span> have </span>veins<span> with smooth, elastic walls that </span>are<span> perfectly designed to </span>adapt<span> to the changes in pressure within a </span>vein<span>. </span>Veins<span> have </span>valves<span> that keep blood moving in one direction: back toward the heart. As the </span>leg<span> muscles </span>are<span> activated, the </span>venous valves<span> open to </span>allow<span> one-way flow in the direction of the heart.</span>
Factors that contributed to the decline of the Roman Empire were:
Incompetent rulers placed huge tax burdens on the Roman citizens.
Rome could not grow enough food and maintain a large enough army to fend off barbarian tribes.
Explanation:
Rome was the center of the antiquity for ages as it was the biggest empire in the world but in the end of it it had become too big for proper management from the seat at Rome
By the time it was ending it had been in a continuous struggle against the barbaric tribes up north that had been weakening thee hold of Rome on the area.
It had become too big to sustain itself and the profits from the agriculture of the empire were just not enough.
I think that the best answer is Albrecht Durer. Durer published books on mathematics and proportions, and additionally he was an artist using the techniques of painting, drawing and printing.
Answer: The answer would be ''Mobilization''.
Explanation: The US army was a force that was mobilized considering the fact that many young men were needed for the war against the opposing forces which would have brought upon an end to the world as the people knew it.
Hope this has helped you, luv!! Goodluck! :-)
