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प्रश्न
What prevents the backflow of blood inside the heart during contraction?
पर्याय
Thick muscular walls of ventricles
Valves
Thin walls of atria
All of the above
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उत्तर
Valves
During contraction, valves prevent the back-flow of blood inside the heart.
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संबंधित प्रश्न
Normal activities of the heart are regulated by ______________.
Where does blood absorb oxygen?
Explain the following:
Why is the SA node called the pace-maker of the heart?
Select the odd one in the following:
Artery, Vein, Capillary, Nerve.
When are the sounds ‘LUBB’ and ‘DUB’ produced during heartbeat ?
State the Function: Coronary artery
Multiple Choice Questions
The beating of the heart of man is heart on the left side, because:
Column 2 is a list of items related to ideas in Column 1. Match the term in Column 2 with the suitable idea given in Column 1.
| Column 1 | Column 2 |
| (i) Superior vena cava | (a) Collect deoxygenated blood from the wall of the heart. |
| (ii) Inferior vena cava | (b) Carry oxygenated blood to heart muscle. |
| (iii) Pulmonary vein | (c) Collects deoxygenated blood from upper part. |
| (iv) Coronary veins | (d) Collects deoxygenated blood from lower parts. |
| (v) Coronary artery | (e) Brings oxygenated blood from lungs. |
| (vi) Aorta | (f) Large artery |
| (vii) Heart attack | (g) Large vein |
| (viii) Blood Pressure | (h) Oxygenated blood |
| (ix) Tricuspid valve | (i) Sphygmomanometer |
| (x) Bicuspid valve | (j) Allows blood flow from right auricle to right ventricle. |
| (xi) Contraction and relaxation of heart | (k) Blocking of coronary arteries. |
| (l) Cardiac muscle. | |
| (m) Allows blood flow from left auricle to left ventricle. | |
| (n) Allows blood flow from right ventricle of pulmonary aorta. |
Draw diagram of conducting system of human heart. Label SA node and bundle of His.
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.
Name two-layered protective covering of the human heart.
Name the heart valve associated with the major arteries leaving the ventricles.
A vein differs from the artery in having ______.
By which of the following mitral valve and tricuspid valve are attached to the papillary muscles?
______ guards the opening of inferior vena cava.
Draw the neat Labelled diagram of the internal structure of the human heart.
Valves are present in ______.
Explain the term Fossa ovalis.
Write the exact location of the following:
Heart
