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प्रश्न
Why is the SA node called the pacemaker of the heart?
उत्तर
The SA node is called the pace-maker of the heart because the wave of contraction which conducts heart beat originates in it.
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संबंधित प्रश्न
Sketch and label the ventral view of the human heart.
Explain with the help of a suitable diagram conducting system of human heart.
Select the odd one in the following:
Tricuspid, Bicuspid, Semilunar, Foramen ovales.
Choose the correct answer:
Which chamber of the heart has the thickest wall?
Given alongside is a highly diagrammatic sketch of the internal structure of the human heart:
(i) Name the parts numbered 1-11.
(ii) What is the main difference in the quality of blood contained in parts 6 and 7?
State the Function: Pericardium
The walls of the right ventricle are thicker than the right auricles.
For which of the following reason the left ventricle of human heart has its wall thicker than the right ventricle?
The kidney is located in the thoracic cavity between the two 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)_____.
