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Question
What is meant by the term 'double circulation' of blood in mammals? What is diastole?
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Solution
Blood flows twice in the heart before it completes one full cycle. This process of blood circulation in the human body is called double circulation.
The expansion or relaxation phase of the atria is called a diastole.
RELATED QUESTIONS
Given below is a diagram of a human blood smear.
Study the diagram and answer the questions that follow:
a) Name the components numbered ‘1’ to ‘4’
b) Mention two structural differences between the parts ‘1’ and ‘2’.
c) Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.
d) What is the average lifespan of the component numbered ‘1’ ?
e) Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain
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The oxygen-rich blood is pumped into different parts of the body through ______.
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The liquid part of coagulated blood is known as ______.
During surgical operations or during accidents, the patient may be given blood from outside to save his life. What is the technical name of this process? Briefly explain the precautions to be taken in this process.
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Arteries and Veins.
Complete the following sentence with appropriate word:
The chamber of heart which pumps blood into aorta is __________.
Which of the following is/are required for the production of RBCs?
