प्रश्न 3. क्रिया किसे कहते हैं? उदहारण देकर स्पष्ट कीजिए।
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kriya se kahate Hain Jo kam ham karte Hain
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The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
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