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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.
दीर्घउत्तर
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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
With which human organ system (or human systems) is the vena cava associated?
Why is it necessary to know the blood groups before giving transfusion?
What is Diapedesis?
Name the following:
The artery which carries deoxygenated blood.
Give reason for the following:
The walls of the left ventricle are thicker than the walls of all other chambers.
Cardiac muscles are ______.
Fill in the blanks with suitable words given below:
The liquid part of coagulated blood is known as ______.
Long answer question:
Describe human blood and give its functions.
The stomach is like a ______.
Match the following.
| Group A | Group B |
| (1) Lungs | (a) Circulation |
| (2) Stomach | (b) Respiration |
| (3) Heart | (c) Co-ordination |
| (4) Brain | (d) Digestion |
