8.
What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?
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Septum
A septum is a diving wall which is present between the the left side and the right side of the heart, which does not allow mixing of blood when oxygen-rich and carbon dioxide- rich blood reach the heart.
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septum
Answer: The presence of septum in the heart does not allow the 'mixing of oxygen-rich' and 'carbon dioxide-rich bloods'. Explanation: As blood is carried into the heart from different 'parts of the body', this deoxygenated blood is rich in carbon dioxide. hope answer is helpful.
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