A lack of movement creates swelling<span> in Barbara's </span>legs<span> because the body relies on pressure </span>created<span> by the </span>movement<span> of muscles to circulate the blood which then moves it back up into the heart. Barbara's arms didn't swell because she is more likely to move them in a car than her </span>legs<span>.</span>
Answer:
Simple diffusion is when the particles travel through the cell and facilitated diffusion is when the molecules travel through the cell.
Answer:
floodplains are usually very fertile agricultural areas. Floods carry nutrient-rich silt and sediment, and distribute it across a wide area.
Explanation:
