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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
Which vein brings clean blood from the lungs into the heart?
Draw a sectional view of the human heart and label on it Aorta, Pulmonary arteries, Vena cava, Left ventricle.
Name the following:
The valve of right auriculo-ventricular aperture.
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
Which part of the heart is contracting in this phase? Give a reason to support your answer.
Draw labelled diagram of internal structure of human heart.
Label right atrium, mitral valve, left ventricle and pulmonary semilunar valve.
Write a function of Eustachian and tricuspid valve found in human heart.
The blood does not flow back into the ______ when mitral valve closes.
In normal health condition, ventricular systole lasts for ______.
Draw the neat Labelled diagram of the internal structure of the human heart.
Give reason:
Valves are present in the veins.
Note the relationship between the first two words and suggest a suitable word/words for the fourth place:
Lub : Atrioventricular valves :: Dup : ______
