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1. How are waste products transported to and from the body cells by diffusion?
2. How are oxygen and dissolved food substances transported to and from the body cells by diffusion?
3. Red blood cells change in shape as they pass along the capillaries. They assume a bell-like shape. Suggest one advantage of this change in shape.
2. How are oxygen and dissolved food substances transported to and from the body cells by diffusion?
3. Red blood cells change in shape as they pass along the capillaries. They assume a bell-like shape. Suggest one advantage of this change in shape.