Well, the respiratory system is responsible for bringing oxygen into the body. Blood passes in capillaries in the lungs and picks up the oxygen. Blood carries oxygen to different parts of the body. Then the blood take carbon dioxide, a waste gas, back to the lungs. Then the lungs expel the carbon dioxide when you exhale.
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Answer:
eing ecids combine to form nucleic acids
Explanation:
I truly don't know
The substances that make up that picture of foods are lipids (cheese), carbohydrates (bread and pasta) and protein (beans). I guess this is what the question asks.
Below that, a summary is that cells are the building blocks of life and are studied extensively in laboratories.