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1) transportation is the circulation of important substances like water and oxygen to all parts of the body so that all cells of the body may function continuesly.
2)circulatory system is the system which is involved in circulation or transportation of essential substances like water and oxygen to all cells of the body through the means of blood.
3) blood is a red fluid flowing through blood vessels which contain important substances to be circulated in whole body.
it contains plasma, red blood cells,white blood cells.
important: RBC also contains haemoglobin
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