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प्रश्न
Describe, in brief, the circulatory system in human beings.
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उत्तर
The circulatory system in human beings consists of heart, blood vessels (arteries, veins and capillaries) and blood. Blood circulates throughout the body in blood vessels by the pumping action of the heart. The impure blood is carried by veins from all parts of the body to the heart. The heart pumps it into the lungs where blood is oxygenated and carried back to the heart. From heart, the oxygenated (pure) blood is pumped to all parts of the body through arteries.
Thus, the circulatory system forms the transport system carrying food, oxygen, waste products, nutrients etc. throughout the body.
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संबंधित प्रश्न
State the functions of blood in our body.
Agranulocytes are :
Give reason, why a matured mammalian erythrocyte lacks nucleus and mitochondria?
When are the sounds "LUBB" and "DUP" produced respectively during heart beat?
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The walls of auricles are thicker than those of ventricles.
Serum differs from blood in lacking ____________.
Which of the following is TRUE regarding closed circulatory system?
Given below are four statements regarding human blood circulatory system:-
- Arteries are thick walled and have narrow lumen as compared to veins.
- Angina is acute chest pain when the blood circulation to the brain is reduced.
- Persons with blood group AB can donate blood to any person with any blood group under ABO system.
- Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
