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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Solution

The special feature present in heart is the presence of muscle called the septum. This septum separates the deoxgenated blood from the oxygenated blood.

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What is the special feature present in human heart which does not allow mixing of blood when oxygen rich and carbon dioxide rich blood reach the heart?

In the human heart, oxygenated blood flows through the right side and carbon dioxide-rich blood flows through the left side.

Which of the following is correct about the pulmonary artery?

I : It contains oxygen rich blood

II : It contains carbon dioxide rich blood

III : It carries blood pumped from the heart to lungs

IV : It carries blood from the lungs to the heart

Q. Which of the following blood vessel carries carbon dioxide rich blood from heart to the lungs?

Fill in the blanks of the following paragraph using just two words – arteries and veins

___(a)___ carry oxygen-rich blood from the heart to all parts of the body and ___ (b)___ carry carbon dioxide-rich blood from all parts of the body back to the heart. ___ (c)___ have thin walls and ___ (d)___ have thick elastic walls. Blood flows at high pressure in ___ (e)___. Valves are present in ___ (f) ___ which allow blood to flow only towards the heart. ___ (g)___ divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form ___ (h)___.

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Heart

Standard VII Biology

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