Biology, 29.11.2019 00:31 abagailb03

Ravi ran 200 metres race in sports day. he feels that his heart was beating faster than usual. a) why was his heart beating faster? b) which all organs are involved along with the heart to ravi complete his race?

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Ravi ran 200 metres race in sports day. he feels that his heart was beating faster than usual. a) wh...