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प्रश्न
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
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उत्तर
- The heart shows autorhythmicity because the impulse for its rhythmic movement develops inside the heart. Such a heart is called myogenic.
- During development, certain heart muscle fibres become autorhythmic (self-excitable) and begin to generate impulses.
- These autorhythmic fibres have two vital functions: they operate as a pacemaker and set the heart's beat.
- They also form a conducting system for the conduction of nerve impulses throughout the heart muscles.
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संबंधित प्रश्न
Draw a sectional view of the human heart and label on it Aorta, Pulmonary arteries, Vena cava, Left ventricle.
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'?
Draw the diagram external features of the heart.
State the Function: Pulmonary artery
State the Function: Chordae tendinae
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.
Name the chambers in human heart?
______ valve is present at the opening of coronary sinus
The heartbeat about ______ in a minute.
Valves are present in ______.
