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In mammalian embryo the pulmonary aorta communicates with caroticosystemic aorta by a narrow ductusarteriosus, in the adult this connectioncloses leaving |
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Answer» The number of times a cycle is COMPLETED in a second is the frequency. The TIME taken to complete one VIBRATION is called time period. Frequency and time period is inversely proportional, the number of VIBRATIONS PER second is frequency. |
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