Science Buddies: "Ask an Expert"

Hello! Why do humans need oxygen? Why do we exhale Carbon Dioxide and water? How does Cellular Respiration work?

Thanks so much

I see that you have posted 4 questions in the Interview Request forum. If you want to interview someone, please read the guidelines for interviews and then post your request following those guidelines:

viewtopic.php?f=82&t=12052

Or, if you are doing a science project, please tell us more details about your project, including your hypothesis and the experiments you are planning. Questions about your science project should be posted in the forum that matches your grade level and the area most suitable for your project which would seem to be Life, Earth and Social Sciences.

Thank you