High concentration to low is called diffusion
19% do not have improved sanitation, while 35% lack water for washing hands
In the electron transport chain. Oxygen is the electron recipient because it is a very strong oxidizing agent(very electronegative) and it keeps the chain going.
Air moves into the lungs when the air pressure in the lungs is lower than the air pressure outside of the lungs. This occurs when the muscels of the diaphragm contract.
You can see this by breathing in and out deeply. When you breath in you can feel your chest being pushed up and out by your diaphragm. The reason the pressure in the chest is lower is that when you breathe in you are increasing the volume of your chest. As there is the same amount of air in your chest the pressure decreases.
<span>Syphilis, a sexually contracted disease. When left untreated it can cause a whole host of health problems.</span>
