Question

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

Answer 1

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In multicellular organisms like humans the body design is very complex and the oxygen demand is quite high. The oxygen requirements of an animal cannot be met by the process of diffusion as diffusion is a very slow process.   To overcome this, multicellular organisms have specialized cells and tissues for performing various necessary functions of the body such as intake of oxygen and food. This helps for the higher animals like humans to meet the sufficient oxygen requirement. Unlike unicellular organisms, multicellular cells are not in direct contact with the outside environment. Therefore, diffusion simply cannot meet their oxygen requirements.

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Answer 2

Answer:

hi the answer is in explaination

Explanation:

Multicellular organisms such as humans possess complex body designs. They have  specialised cells and tissues for performing various necessary functions of the body such as intake  of food and oxygen. Unlike unicellular organisms, multicellular cells are not in direct contact with  the outside environment. Therefore, diffusion cannot meet their oxygen requirements.

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