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प्रश्न
What is the Rh-factor?
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उत्तर
The Rh-factor was first discovered in the Rhesus monkey. It was found that Rh (rhesus) antigens were causing many of the transfusion failures that were unexplained by the A-B-O system. There are at least eight different Rh antigens so far. The person bearing Rh-factor is Rh+ve and a person who does not possess this factor is Rh-ve.
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संबंधित 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.
Match the statements in Column A with those in Column B:
A blood vessel which has small lumen and thick wall is ______.
Why do people have a common belief that the heart is located on the left side of the chest?
How do you account for the following difference?
The walls of the right ventricle are thicker than those of the right auricle.
Choose the correct answer:
English physician who discovered blood circulation was ___________
Explain the main parts of the circulatory system.
The endocrine glands produce chemical substances called ____
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Can you answer why the pulmonary artery shown in Fig. is blue in colour?
Mention the phase of heart beat in which both the atrio-ventricular valves are closed.
