Difussion occurs from a high concentrated region to a low concentrated region. The velocity of diffussion is proportional to the differential of concentrations. In the lung arrives blood with low levels of oxygen while the long is rich with fresh oxygen so the oxygen flows from the lung tissues to the blood.
The other tissues consume oxygen continually them they get poor in oxygen and so the oxygen that is in the blood diffuses to the tissue that is poor in oxygen.
Answer:
it is important to choose skin care products based on skin type because
1. you'll be wasting money on stuff not for your skin type
2. products not for your skin type may not work
3. you may have a bad reaction to products that aren't for your skin type
Do you have a picture so I can match them
B) To reduce chances of falls
