Which of these is the job of the respiratory system?

Holding up the body and giving it support and shape.

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Gas exchange between the external environment and the body's circulatory system.

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Breaking down food for it to be used by the body.

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Transfer information from one generation to another.

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Solution

The correct option is B Gas exchange between the external environment and the body's circulatory system.
The respiratory system is responsible for the gas exchange between the external environment and the body's circulatory system. The respiratory system provides oxygen to the body's cells while removing carbon dioxide, a waste product that can be lethal if allowed to accumulate.

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Give one reason why multicellular organisms require special organs for exchange of gases between their body and their environment .

__is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair.

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