Sorry to take up a answer but the picture is not in the correct format for brainly!!! Upload again so I can help.
The main form is carbon dioxide and methane
Enzymes are made of strings of amino acids chemically bonded to one another. These bonds give each enzyme a unique structure, which determines its function. They mostly break down carbohydrates and fats. Once a protein source reaches your stomach, hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids. Amino acids are joined together by peptides, which are broken by proteases.
Answer: The respiratory system, the circulatory system, and the muscular system
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