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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
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'?
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?
The diagram given below represents the human heart in one phase of its functional activities. Study the same and answer the questions that follow:
(i) Name the phase.
(ii) Label the parts 1, 2 and 3
(iii) Which part of the heart is contracting in this phase ? Give a reason to support your answer.
Name the Following
Number of chambers present in the human heart.
State the Function: Chordae tendinae
Short answer question.
What is the role of papillary muscles and chordae tendinae in the human heart?
Which of the following event occurs during atrial systole?
The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______
State the exact location of the following structure.
Papillary muscles
Define the following term:
Heart
