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प्रश्न
Why is the SA node called the pacemaker of the heart?
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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
Name the following:
The valve of right auriculo-ventricular aperture.
Choose the correct answer:
In mammals the opening of post caval in the right auricle is guarded by _________
The number of chambers in human heart are _______
For which of the following reason the left ventricle of human heart has its wall thicker than the right ventricle?
____________ branches from bundle of His and forms a network in ventricular walls.
The heartbeat about ______ in a minute.
Explain the structure of heart.
Analogy:
Skeletal muscle: Muscle of arm.
Cardiac muscle: ______.
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
Give reason:
Pulmonary veins carry oxygenated blood.
