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placenta

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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).


Are the substances present before the reaction?

Substances that are present before the reaction are called "reactants" or "reagents".


Substances that are present before the reaction?

Substances that are present before the reaction are called "reactants" or "reagents".


Why would the tunica media and tunica adventitia not be present in a capillary?

To permit material exchange between blood and tissues.


What substances are present in blood?

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What is the difference between a non-radioactive substance and a radioactive substance?

Radioactive substances are unstable as a result of the extra neutrons present in the nuclei of the substance. Non-radioactive substances are stable.


Are the substances that present when a chemical reaction begins the products?

The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.


These are the substances that are present before the raction?

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Do stomata present in mushroom?

No , stomata are not present in mushroom as they are fungi . Stomata are present in plants for gaseous exchange .


Are organic and inorganic substances present in living things?

Yes, both organic and inorganic substances are present in living things. Organic substances include carbohydrates, lipids, proteins, and nucleic acids, while inorganic substances like water, minerals, and gases are also essential for life processes.


These are the substances that are present after the reaction has taken place?

Products.