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Why is diffusion insufficient to meet th...

Why is diffusion insufficient to meet the oxygen requirements of multi- cellular organisms like humans?

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### Step-by-Step Solution: 1. **Understanding Diffusion**: - Diffusion is the process where gases move from an area of higher concentration to an area of lower concentration. This is a natural process that occurs in many biological systems. 2. **Diffusion in Unicellular Organisms**: - In unicellular organisms, diffusion is often sufficient for gas exchange. These organisms have a simple structure and a small size, allowing gases to diffuse quickly and efficiently to all parts of the cell. ...
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