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प्रश्न
Answer in only one sentence of the following question:
Mention the role of the pacemaker in human heart.
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उत्तर
- The Sinu-auricular (SA) node is the pacemaker of the heart.
- It generates wave of contraction which spread along the wall of atria and bring about their contraction.
- It has highest degree of rhythmicity and is the first to originate the cardiac impulses and determine the rate of heart beat.
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संबंधित प्रश्न
What is Sinus arrhythmias?
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
How many valves are closed in this phase?
Give Technical Term for the following:
The phase of cardiac cycle in which the auricles contract
Complete the following sentence with appropriate word:
The ______ is the most powerful organ in the circulatory system.
How are arteries and veins structurally different from one another?
____________ branches from bundle of His and forms a network in ventricular walls.
The correct match of blood vessel, its connection and O2 content is ____________.
The heart is surrounded by a double-layered membrane called ______.
Where is Bicuspid valve located? What is its function?
Which one of the following is a correct statement regarding human heart?
