Question
What is the main function heart? Describe Cardiac Cycle.
Answer :
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हृदय (Heart) का मुख्य कार्य शरीर में रक्त का संचार बनाए रखना है। यह एक पेशीय (muscular) अंग है जो पंप की तरह कार्य करता है और ऑक्सीजन युक्त रक्त को शरीर के विभिन्न अंगों तक पहुँचाता है तथा अशुद्ध रक्त को फेफड़ों तक भेजता है, जहाँ से कार्बन डाइऑक्साइड बाहर निकलती है और रक्त पुनः ऑक्सीजन प्राप्त करता है। हृदय शरीर में पोषक तत्व, हार्मोन तथा ऑक्सीजन पहुँचाने और अपशिष्ट पदार्थों को
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