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प्रश्न
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.
उत्तर
- Ventricle parts of the heart.
- These are the lower two chambers of the heart.
- Distinguish between Systole and diastole:
| S. No. | Systole | Diastole |
| 1. | Occurs when the heart contracts to pump blood out. | occurs when the heart relaxes after a contraction. |
| 2. | The normal range of systolic blood pressure should be 90 - 120mmHg. | The normal range of diastolic blood pressure should be 60 - 80 mm Hg. |
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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?
Name the following:
The inflammation of pericardium.
Choose the correct answer:
In mammals the opening of post caval in the right auricle is guarded by _________
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'?
Answer in only one sentence of the following question:
Mention the role of the pacemaker in human heart.
Complete the following sentence with appropriate word:
The ______ is the most powerful organ in the circulatory system.
State the Function: Pulmonary artery
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
Identify the CORRECT route through which impulse travels in the heart.
Analogy:
Skeletal muscle: Muscle of arm.
Cardiac muscle: ______.
