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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
Normal activities of the heart are regulated by ______________.
Explain with the help of a suitable diagram conducting system of human heart.
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
What type of blood flows through the parts marked '1' and '2'?
Complete the following sentence with appropriate word:
The heart is made up of special muscles, the _______ muscles.
Choose the Odd One Out:
Short answer question.
What is the role of papillary muscles and chordae tendinae in the human heart?
What is the function of pericardial fluid?
Why are the walls of the left ventricle thicker than the other chambers of the heart?
Explain the structure of heart.
In human foetus, the heart begins to beat at developmental age of
