Oxygen, it takes in Carbon Dioxide and releases Oxygen as a waste :)
Earth's atmosphere is 78%<span> nitrogen </span>21%<span> oxygen, </span>0.9%<span> argon, and </span>0.03%<span> carbon dioxide with very small percentages of other elements.
hope it helps</span>
Answer:
Go to bed at the same time every evening and wake up at the same time in the morning.
Explanation:
The three large arteries originating from the aortic arch are the brachiocephalic trunk<span>, left </span>common carotid artery<span>, and left </span>subclavian artery<span>.</span>
1. 2
2. 34
3. 34
4. 2
Explanation:
2
34
34
2