Why is the circulatory system called the transport system?

Because the circulatory system carries oxygen and nutrients to tissues and organs, immune cells to fight viruses and bacteria, platelets to block bleeding, other cells, heat, etc. Also, through the circulatory system, they are transferred to the metabolic product, for example, oxygen is supplied to the blood from the lungs to the organs and tissues, and carbon dioxide is carried back, which is exhaled back through the lungs.



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