) what is the summary of this passage
Coronany by pass surgery is
undoubtedly' significantº achievernet
of modern medical sciene - One
ponders over certain question
such as cost involved and benefit
The human heart has a four-
chambered moscular pomp which
supplies blood to all part of body
heart an active pump itsey
requires energy and recieves oion
blood supply via vessels cable lave
coronary arteries
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