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प्रश्न
What is meant by the term 'double circulation' of blood in mammals? What is diastole?
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उत्तर
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.
संबंधित प्रश्न
The vein that carries oxygenated blood.
State the functions of blood in our body.
What is meant by human circulatory system?
Given alongside is a diagram of human heart showing its internal structures. Label the parts marked 1 to 6, and answer the following questions.
- Which type of blood is carried by the blood vessel marked 2?
- Name the main artery which takes the blood from heart to different parts of the body?
- Which chamber of the heart receives deoxygenated blood from the body?
Is it true that your heart beats more than one lac times per day?
What is Endothelium?
How do you account for the following difference?
The walls of the right ventricle are thicker than those of the right auricle.
Match the statements in Column A with those in Column B
| Column A | Column B | ||
| 1 | Heart | a | Movement of materials |
| 2 | Food and oxygen | b | Channels for transport in man |
| 3 | Carrier of oxygen | c | A living pump |
| 4 | Circulation | d | Materials needed by every living being |
| 5 | Arteries and veins | e | Red blood cells |
Which of the following correctly represents the components of blood?
Identify the normal haemoglobin count in human females.
