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

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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 center in the medulla.The initiation of respiration then follows.Which is not one of these essential factors?


Definitions:

Transform Boundary

A type of plate boundary where two tectonic plates slide past each other horizontally, often associated with earthquakes.

Mantle

The layer of the Earth between the crust and the outer core, composed of silicate rocks that are rich in magnesium and iron.

Melting

The process of changing from a solid to a liquid state due to an increase in temperature and/or a decrease in pressure.

Island Arc

An island arc is a chain of islands formed from the volcanic activity associated with the subduction zones of tectonic plates, typically located in the ocean.

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