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During Life in Utero,oxygenation of the Fetus Occurs Through Transplacental

question 5

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During life in utero,oxygenation of the fetus occurs through transplacental gas exchange.When birth occurs,four factors combine to stimulate the respiratory centre in the medulla.The initiation of respiration then follows.Which of the following contributes to the dynamic sequence of events that occur with the infants' first breath?


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