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प्रश्न
What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?
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उत्तर
The human heart is four chambered consisting of two atria and two ventricles. The left side of the heart receives oxygen-rich blood whereas the right side of the heart receives carbon dioxide-rich blood. The left and right sides of the heart are completely separated from each other by a muscular septum, which prevents the mixing of oxygen-rich and carbon-dioxide rich blood.
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संबंधित प्रश्न
What are the various components of blood? State their functions.
The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body.
(a) What is (i) tissue A (ii) pigment B, and (iii) colour C?
(b) Name (i) D (ii) E (iii) F, and (iv) G.
(c) Name one substance (other than oxygen) which is transported by tissue A in the human body.
(d) Which two components of tissue A are the cells without nucleus?
(e) Name any two organisms ( animals) which do not have liquid like A in their body.
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Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
Name the only artery that carries carbon dioxide-rich blood.
Why is it called an artery if it does not carry oxygen-rich blood?
While learning to ride a bicycle Boojho lost his balance and fell. He got bruises on his knees and it started bleeding. However, the bleeding stopped after some time.
- Why did the bleeding stop?
- What would be the colour of the wounded area and why?
- Which type of blood cells are responsible for clotting of blood?
Least abundant leucocyte is ______.
Find out about blood groups and their importance.
Define the following term:
Blood
