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denis-greek [22]
3 years ago
7

What are three inventions used to reduce friction??

Biology
1 answer:
serious [3.7K]3 years ago
5 0
Lubricants, Magnetic Levitation, Ball Bearing
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The gas exchange during cellular respiration involves oxygen moving into cells and carbon dioxide moving out of cells.

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The lungs and respiratory system permit us to respire. they create oxygen into our bodies (called a concept, or inhalation) and send carbon dioxide out (referred to as expiration, or exhalation). This alternate of oxygen and carbon dioxide is referred to as respiratory.

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