They've gone up. They didn't have much choice, since before the Big Bang there was none at all.
Respiratory system
The balance of oxygen and carbon dioxide is maintained in the atmosphere by the oxygen released by plant during photosynthesis and carbon dioxide released by human ,animal's etc in the atmosphere
methane oxygen hydrogen anesthtic helium carbon dioxide
Plants They take in carbon dioxide Then keep the carbon to grow and give out oxygen
Jan Ingenhousz dutch born british scientist is know for his discovery of photosynthesis by which plants in sunlight absorb carbon dioxide and release oxygen.
Oxygen and carbon dioxide change in the lungs.
well, you don't breath carbon dioxide, you breath oxygen
Carbon Dioxide
Oximetry.
Cellular respiration uses oxygen and generates carbon dioxide. Photosynthesis uses carbon dioxide and generates oxygen.
if the oxygen levels are too low, your muscles won't get the oxygen they need from the blood cells. if the carbon dioxide levels are too high, well, carbon dioxide is a waste product, the same thing will happen. this is why when you hold your breathe you pass out. if the muscles don't get the oxygen they need they can't move.
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the oxygen releases carbon dioxide
Carbon dioxide is increasing in the atmosphere, and oxygen is decreasing.
levels of oxygen and carbon dioxide would decrease and levels of carbon dioxide would increase.
With increased breathing, levels of carbon dioxide in the blood drop and levels of oxygen rise.
What are ways the body changes the way we breathe in effort to keep our levels of oxygen and carbon dioxide balanced