Feu vkdu qtg gi. rls joi. n for study here i am also a girl here we study girl is allowed here boy are not allowed here we only study so co. me for study in me. et. ing gir. ls co. me for study​ here its boys disturb me. eting so boys not allowed girls is allowed i am also a girl its a safe me. et. ing​j​

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?