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placenta

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โˆ™ 2013-02-03 16:41:23
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Q: Which organ allows an exchange of substances between mother and fetus and is only present during gestation?
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Which organs allows an exchange of substances between mother and fetus and is only present during gestation?

placenta


Why exchange of substances blood and cells take place through capillaries?

Capillaries have thin and permeable walls which allow the exchange of substances (such as nutrients, oxygen and CO2) to occur. This enables substances to dissociate throughout the entire body (as capillaries are present throughout the entire body).


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Substances that are present before the reaction?

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The substances present when a chemical reaction begins?

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