For example, oxygen (o₂) diffuses from the air sacs into the capillaries of the lungs because there is a concentration of oxygen in the alveoli (air sacs) than the capillaries.

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast