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In veins, valves are present to check ba...

In veins, valves are present to check backward flow of blood flowing at

A

atmospheric pressure

B

high pressure

C

low pressure

D

all of these

Text Solution

Verified by Experts

The correct Answer is:
C
Veins brings blood from different body parts to the heart. The flow of blood in veins is not so fast because the blood in veins is under low pressure. Veins posses valves which present backward flow of blood.
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Assertion : There is no mixing of oxygenated and deoxygenated blood in the human heart. Reason : Valves are present in the heart which allows the movement of blood in one direction only.

NCERT FINGERTIPS-BODY FLUIDS AND CIRCULATION-Body Fluids And Circulation
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  2. All veins carry deoxygenated blood except

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  3. In veins, valves are present to check backward flow of blood flowing a...

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  4. Which of the following statements is correct regarding veins ?

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  5. Match column I with column II and select the correct option from the c...

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  6. Consider the following four statements (i)-(iv) and select the correct...

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  7. The rate of heartbeat is regulated by the integrated activity of inhib...

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  8. Hormonal regulation of cardiac activity involves the hormones "" and "...

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  9. Which of the following statements is correct regarding neutral regulat...

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  10. Consider the following four statement (i) - (iv) and select the correc...

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  11. An adult human with average health has systolic and diastolic pressure...

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  12. If the systolic pressure is 120 mm Hg and diastolic pressure is 80 mm ...

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  13. Blood pressure is defined as the force with which blood

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  14. Which one of the following statements is correct regarding blood pres...

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  15. Which one of the following is incorrect for atherosclerlsis ?

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  16. The given figure shows an angiogram of the coronary blood vessel. Whic...

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  17. Match column I with column II and select the correct option from the c...

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  18. During acute myocardial infraction which of the following changes occu...

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  19. Given below are four statements (i-iv) regarding human blood circulato...

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  20. Refer to the given electrocardiogram and select the correct statement

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