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प्रश्न
Normal activities of the heart are regulated by ______________.
पर्याय
brain
brain
spinal cord
spinal cord
modified cardiac muscles
modified cardiac muscles
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उत्तर
Modified cardiac muscles
Normal activities of the heart are auto-regulated by specialized muscles.
APPEARS IN
संबंधित प्रश्न
| The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into the lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of the pumping organ. Contraction of chamber G forces the deoxygenated blood into the right lower chamber H. And finally, the contraction of chamber H sends the deoxygenated blood into the lungs through blood vessel I. |
- What is organ A?
- Name the blood vessel (i) B (ii) E (iii) F, and (iv) I.
- What are chambers (i) C, and (ii) D?
- What are chambers (i) G and (ii) H?
Define the term Circulatory system.
Name an instrument which is used to hear heart sounds.
______ is known as pacemaker of heart.
Why are the walls of the left ventricle thicker than the other chambers of the heart?
For which of the following reason the left ventricle of human heart has its wall thicker than the right ventricle?
Explain the term Fossa ovalis.
The diagram below depicts the human heart in one of its phases. Answer the questions that follow:
- Which part of the heart is in the contraction phase?
- Give a suitable reason to justify your answer in (a).
- Distinguish between Systole and Diastole.
Give the exact location of the pericardium.
Distinguish between the following pair on the basis of words indicated in the bracket ( ):
Mitra! valve and Tricuspid valve (Location)
