It takes place <span>between the alveoli and capillaries, which are located in the walls of the alveoli.</span>
While 70% of the world is covered with water only 2.5 % of it is fresh. The rest of the water is salty water.Just 1% of our fresh water is easy to get with much of it trapped in glaciers and snowfields
Answer:
Explanation:
The cells in our bodies need oxygen to stay alive. Carbon dioxide is made in our bodies as cells do their jobs. The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.
