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प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow:
- Which parts of heart are in the diastolic phase? Give a reason to support your answer.
- Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
- What causes the heart sounds ‘LUBB’ and ‘DUP’?
- Name the blood vessels that supply oxygenated blood to the heart muscles.
- Draw neat labelled diagrams of a cross section of an artery and a vein.
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उत्तर
- Ventricles are in the diastolic phase. The arrows indicate blood entering the ventricles. During a ventricular diastole, the valves between atria and ventricles open which allow the entry of blood into the ventricles.
- 1: Pulmonary artery
2: Pulmonary veins - Closing of the bicuspid and tricuspid valves causes the ‘LUBB’ sound, and the closing of semilunar valves causes the ‘DUP’ sound.
- Coronary arteries supply oxygenated blood to the heart muscles.
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संबंधित प्रश्न
The blood from the heart is transported to all parts of the body by the ______.
Find out my partner.
| Group ‘A’ | Group ‘B’ |
| 1. Heart beats | a. 350 ml |
| 2. RBC | b. 7.4 |
| 3. WBC | c. 37°C |
| 4. Blood donation | d. 72 |
| 5. Normal body temperature | e. 50-60 lakh/mm3 |
| 6. pH of oxygenated blood | f. 5000-6000 per mm3 |
Put a tick mark (✓) against the correct alternative in the following statement.
The only artery which carries deoxygenated blood is called,
Fill in the blanks with suitable words given below:
The ______ artery takes the blood from the ventricles to the lungs.
Write a short note on the human heart.
Use your brain power!
How is the air that we inhale purified in our body?
Spleen is referred to as ______.
 |
Can you answer why the pulmonary artery shown in Fig. is blue in colour?
Name the following:
Contraction phase of heart.
Name the following:
The structure that holds the heart valves in position.
