Where does the carbon dioxide come from
that we exhale during cellular respiration?

The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat. The carbohydrates, fat and proteins we consume and digest are eventually converted by a number of different biochemical pathways in the body to glucose (C6H12O6)

Explanation:

░░░░░░░░░░░░▄▐░░░░░░ ░░░░░░▄▄▄░░▄██▄░░░░░ ░░░░░▐▀█▀▌░░░░▀█▄░░░ ░░░░░▐█▄█▌░░░░░░▀█▄░ ░░░░░░▀▄▀░░░▄▄▄▄▄▀▀░ ░░░░▄▄▄██▀▀▀▀░░░░░░░ ░░░█▀▄▄▄█░▀▀░░░░░░░░ ░░░▌░▄▄▄▐▌▀▀▀░░░░░░░ ▄░▐░░░▄▄░█░▀▀░░░░░░░ u have been spooked by the ▀█▌░░░▄░▀█▀░▀░░░░░░░ ░░░░░░░▄▄▐▌▄▄░░░░░░░ ░░░░░░░▀███▀█░▄░░░░░ ░░░░░░▐▌▀▄▀▄▀▐▄░░░░░ spooky skilenton ░░░░░▐▀░░░░░░▐▌░░░░░ ░░░░░░█░░░░░░░░█░░░░ ░░░░░▐▌░░░░░░░░░█░░░ ░░░░░█░░░░░░░░░░▐▌░░ send this to 4 ppl or skelintons will eat you

This is s cute awee : (( . well if she's showing you signs that she may like you , then shoot your shot ! don't be afraid . & if you're unsure that she's giving you these signs , then wait out for a little bit . most girls are different . some may act really sweet , but only bc you're a good friend of hers . that , or she might like you . you just never know . but i think you should sit down with her & tell her how you feel . but don't be awkward & shy . just be straight up & tell her how you feel . if the feelings aren't mutual , then don't cry about it . you need to respect her decision & look for others in the world . feelings can be difficult & confusing , but don't be afraid to show them . i say you play it out & if you're still unsure about it , talk to her . - rach