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प्रश्न
The diagram below represents the human heart in one phase of its function. Study the diagram carefully and answer the questions that follow:
(i) Name the phase.
(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.
(iii) Name the parts labelled 1 to 4.
(iv) What type of blood flows through ‘2’?
(v) State the function of the part numbered ‘5’.
(vi) Name the membrane that covers the heart.
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उत्तर
(i) Ventricular systole
(ii) Ventricles are contracting in this phase. In the diagram given, tricuspid valves and bicuspid valves are closed, while the semi-lunar valves are open.
(iii)
1 – Pulmonary artery
2 – Aorta
3 – Bicuspid valve
4 – Semilunar valve (aortic semilunar valve)
(iv) Oxygenated blood flows through ‘2’, i.e. aorta.
(v) ‘5’ is pulmonary semilunar valve. It prevents the backflow of blood into the right ventricle at the time of ventricular diastole.
(vi) Pericardium covers the heart.
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संबंधित प्रश्न
State the exact location of the Chordae tendinae
Name the following:
The fluid found between the membranes of the heart.
Give reason for the following:
The blood groups of both the donor and recipient must be known before transfusing blood.
Explain with reasons.
Human blood is red coloured.
pH of oxygenated blood is ______.
Put a tick mark (✓) against the correct alternative in the following statement.
Pulmonary vein carries
True or false:
People with blood group ‘O’ are called universal recipients
True or false:
Blood group A has antigen A.
The table below is designed to indicate the transport of certain substances in our body. Fill in the blanks with suitable answers.
| Substance | From | To | |
| 1. | ______ | Lungs | Whole Body |
| 2. | Carbon Dioxide | ______ | ______ |
| 3. | Urea | ______ | ______ |
| 4. | Digested Carbohydrates | Intestines | ______ |
| 5. | ______ | ______ | Target Organs |
| 6. | Heat | ______ | Whole Body |
Distinguish between Intrinsic and extrinsic process of clotting
