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Why is there a need of transportation system in multi -cellular organism to carry food and oxygen from one place to another?

Posted by Dhanasree .R 5 years ago

CBSE > Class 10 > Science

2 answers

Shivam Rai 5 years ago

because in multicellular organisms the body size is usually complex if the gases and the required substances has to be transferred though diffusion then it to take a long time. For example if the gas is has to be transported through our lungs to the toe than it would take about three years to transfer a molecule of oxygen from our lungs to the toe

1Thank You

Haripal Singh 5 years ago

Because in higher organisms diffusion won't help in transportation and the transportation involves movement of metabolic waste,glucose,water,etc. so to work this out there is a need felt for transportation system for their displacement

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CBSE > Class 10 > Science