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>
<span>The first thing she must do in order to meet her goal of helping students learn is </span>"Gain students'<span>attention".
One of the greatest difficulties teachers confront is getting (and keeping) their students consideration. Figuring out how to do as such requires some time and practice, yet viable instructing requires it. Regardless of whether you're another or experienced educator, systems for getting student consideration are a critical piece of your classroom-administration toolbox.
</span>
The answer of black males it wasnt until February 3, 1870 till african americans were permitted to vote due to the 15th Amendment
B.<span>lead to health problems!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</span>
Answer: Early people developed different cultures based on their environments, hope this helps.
Explanation: