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Question
Draw diagram of conducting system of human heart. Label SA node and bundle of His.
Diagram
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Solution
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| 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?
Complete the following sentence with appropriate word:
The average heartbeat rate is ____ beats per minute in human being.
Multiple Choice Questions
The beating of the heart of man is heart on the left side, because:
In normal health condition, ventricular systole lasts for ______.
______ is the opening of the upper chamber of the heart into the lower chamber.
The heartbeat about ______ in a minute.
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
Give reason:
Pulmonary veins carry oxygenated blood.
What is the role of Paplillary muscles?
Define the following term:
Heart
