Question

what is the role of circular system in energy production ​

Answer 1

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The cardiovascular system does not produce energy, it allows the transport of energy rich substances [like glucose, fatty acids and other nutrients] and oxygen in the blood to the body's cells so they can produce the energy to run those cells. Cells produce energy through process called cellular respiration

Answer 2

The cardiovascular system does not produce energy, it allows the transport of energy rich substances [like glucose, fatty acids and other nutrients] and oxygen in the blood to the body's cells so they can produce the energy to run those cells.