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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
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?
Name the Following
The valve present between the left atrium and the left ventricle.
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.
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?
______ is the nodal tissue located in the lower-left corner of the right atrium.
Ligamentum arteriosum is the remnant of an embryonic duct which joins ____________.
Which of the following event occurs during atrial systole?
Analogy:
Heart: Pericardium membrane.
Lungs: ______.
Explain the term Ligamentum arteriosum.
