Are there any parts of the human body that get oxygen directly from the air and not from the blood? 10 points

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

What is the next step in muscle contraction after the actin changes shape? (apex)

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community