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प्रश्न
The ______ have thin and less muscular ______ and have ______ to prevent back flow of ______.
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उत्तर
The veins have thin and less muscular thin pocket-shaped walls and have valves to prevent back flow of blood.
संबंधित प्रश्न
Where does blood absorb oxygen?
State the Location: Sino-auricular node
The phase of contraction of heart is termed as ______.
Pick out the odd one.
heart, legs, brain, kidney
Mention the artery which supplies blood to the heart muscle.
For which of the following reason the left ventricle of human heart has its wall thicker than the right ventricle?
How many times per healthy man beats?
In ____________ of a mammalian heart O2 rich blood enter first.
The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______
In human foetus, the heart begins to beat at developmental age of
