The answer is an open system
It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance. also catalyse reactions in our bodies, transport molecules such as oxygen, keep us healthy as part of the immune system and transmit messages from cell to cell.
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➷ The structure that provides the best surface for diffusion to occur is the bronchioles.
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One cell produces two genetically identical daughter cells is both mitosis and meiosis.
