Ans - Human beings follow a closed circulatory system which means that blood is always enclosed in vessels and the heart while circulating throughout the body. Traveling through arteries and veins, blood carries important molecules throughout the body and is always confined
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Ans - Human beings follow a closed circulatory system which means that blood is always enclosed in vessels and the heart while circulating throughout the body. Traveling through arteries and veins, blood carries important molecules throughout the body and is always confined