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To transport stuff around your body and to prevent you from dying

answ2. The above is correct. Blood transports food, hormones and oxygen around the system, and also carries waste products to the lungs (CO2), Liver and Kidneys. Your blood supply also carries chemicals and cells designed to fight infections.

The blood supply arrives in evolution about the time of the advanced worms, the Geonemertine. At the same time, the brain arrives! (But the heart is left out of it yet.)

Whilst a collection of nerves are capable of reaction, a brain is capable of more than mere reaction. It is capable of learning!

In any event, no blood supply - no brain.

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14y ago

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