Question

what are the chemical reactions in our body? ​

Answer 1

Carbon dioxide is a waste product of respiration and in the lungs it passes out of the blood and is breathed out. Respiration is a chemical process when glucose or other sugars react with oxygen to produce energy. It produces carbon dioxide and water as waste products.

Answer 2

HCL secreted in our stomach to digestion.
Saliva helps to convert starch to glucose.
Oxygen is taken in and co2 is let out .