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A ventilation system is needed in order to obtain oxygen for living organisms and to get rid of carbon dioxide. Surface diffusion utilized by many smaller organisms is not sufficient in supplying the oxygen needs of the body. It is also needed to maintain a concentration gradient in the alveoli.

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Q: Why do multi-cellular organisms need a ventilation system?
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Related questions

Why did the need for hormones and an endocrine system arise with multicellular organisms?

because chicken wangs cow burger


Why do multi cellular organisms need a ventilation system?

A ventilation system is needed in order to obtain oxygen for living organisms and to get rid of carbon dioxide. Surface diffusion utilized by many smaller organisms is not sufficient in supplying the oxygen needs of the body. It is also needed to maintain a concentration gradient in the alveoli.


Transport system needed multicellular organisation?

because multicellular organisms cannot survive on diffusion alone. as a result, they need these mechanisms to transport nutrients and substances through the body


Is a cat unicellular or multicellular?

A cat is multicellular. Multicellular organisms have more than two cells. A multicellular organism is one that can be seen without the need of a microscope.


What do all multicellular organisms need to get energy?

carbon dioxide or oxygen


Do all multicellular organisms need oxygen for their cells to get energy they?

yes


Why does complex multicellular organisms need a nervous system?

Complex multi cellular organisms need a nervous system to be able to contact the brain and be informed on which tasks need performing. Hope this helps...


Would multicellular organisms function without specialized cells?

no it cant because multicellular organisms need specilized cells in order for them to remain stable to focus in one job


Why do multicellular organisms need specialized tissues?

Cell specialization is necessary to support multicellular life because multicellular organisms need different tissues. This means it needs cells to make up those tissues and perform different functions.


What do organisms need in order to reproduce?

Most multicellular organisms reproduce sexually .


What forms of life do not require oxygen?

The first multicellular life does not need oxygen. That is the only type of life that does not need any oxygen at all basically. It is because a lot of organisms do not need the respiratory system at all.


Is a cat made up of one cell?

A cat is multicellular. Multicellular organisms have more than two cells. A multicellular organism is one that can be seen without the need of a microscope.