Answer:
carbon dioxide passes from the blood into the alveoli and is then exhaled. Oxygenated blood travels from the lungs through the pulmonary veins and the cycle goes on every time you breath or inhale you inhale oxygen into your blood cells.
Explanation:
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Answer:
Boundaries. I have gave you anwer
Mining can put dirt specs in the air along with other harmful stuff. when mining there’s specs that are going into the air that can go into your eyes, mouth & even ears, which can be harmful.
