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प्रश्न
The walls of the right ventricle are thicker than the right auricles.
उत्तर
The walls of the right ventricle are thicker than the right auricle because, the right ventricle has to pump out the blood with force to the Pulmonary trunk, which bifurcates to form the right and left Pulmonary Arteries.
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संबंधित प्रश्न
Write a short note on human heart.
Match the terms given in column I with terms in Column II:
| Column I | Column Il |
| (i) Left-auricle | (a) Clotting |
| (ii) Right auricle | (b) Thebasius valve |
| (iii) Left ventricle | (c) Pulmonary vein |
| (iv) Right-ventricle | (d) Aorta |
| (v) Fibrin | (e) Pulmonary arch |
Why is the SA node called the pacemaker of the heart?
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. |
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______
The heartbeat about ______ in a minute.
Give the meaning of pacemaker.
Explain the term Chordae tendinae.
Note the relationship between the first two words and suggest a suitable word/words for the fourth place:
Lub : Atrioventricular valves :: Dup : ______
