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Which of the following statements are true about the veins in the human circulatory system? I. All veins carry carbon dioxide-rich blood. II. The walls of the veins are thin. III. Veins carry blood from various organs to the heart.

Which of the following statements are true about the veins in the human circulatory system? I. All veins carry carbon dioxide-rich blood. II. The walls of the veins are thin. III. Veins carry blood from various organs to the heart. Correct Answer II and III

Explanation:

  • In a closed blood circulation system three types of blood vessels are present:
  • Arteries:
    • These carry pure oxygenated blood from the heart to different organs of the body.
    • The wall of arteries are thick compared to veins due to higher blood pressure in Arteries
  • Veins:
    • These carry impure carbon dioxide-rich blood from body organs to the heart.
    • The walls of veins are thin as compared to the arteries because the pressure of blood flow is low.
  • Capillaries:
    • These are present in organs, and these are the vessels through which exchange takes place.

But we have exceptions. 

Exceptions - 

  • The pulmonary vein carries oxygenated blood from the lungs to the heart.
  • The pulmonary artery carries deoxygenated blood from the heart to the lungs.

Conclusion:

  • So, Statement 1 is incorrect, because the pulmonary vein is a type of vein which do not carry carbon dioxide but carries oxygenated blood. 
  • 2 and 3 statements are correct as veins have a thin wall and it carries blood from different organs to the heart. 
  • The correct option is B and C.

Related Questions

Consider the following statements about the Open and Closed Blood Circulatory System:   A) Open blood circulatory system does not contain special blood vessels to carry oxygenated and deoxygenated blood, while in the closed blood circulatory system blood vessels are present. B) Oxygenated and Deoxygenated blood gets mixed in the closed blood circulatory system, while oxygenated and deoxygenated blood does not get mixed in the open blood circulatory system. Choose the correct statement.
Which of the following statements are true about veins in the human circulatory system? A. All veins carry carbon dioxide-rich blood. B. Veins have thin walls. C. Veins carry blood from different organs to the heart.
S1: There is no transportation system in any city that can compare in efficiency with the circulatory system of the body.
P: The larger one goes from the heart to the various other parts of the body.
Q: If you imagine two systems of pipes, one large and one small, both meeting at a central pumping station, you'll have an idea of the circulatory system.
R: These pipes are called arteries, veins and capillaries.
S: The smaller system of pipes goes from the heart to the lungs and back.
S6: Arteries are blood vessels in which blood is going away from the heart.

The Proper sequence should be:
With reference to the Human Circulatory System consider the following statements. William Harvey was the first person to  describe blood circulation in the body. In closed circulatory systems there is no distinction between blood and interstitial fluid In open circulatory systems blood vessels are found throughout the body and form the plumbing circuit of the body. Which of the statements given above is/are NOT correct?
Which of the following statement is correct? I. Arteries are the vessels which carry blood away from the heart to various organs of the body Il. Veins collect the blood from different organs and bring it back to the heart.
In human circulatory system, X are blood vessels which carry deoxygenated blood and have Y walls. Z carries blood from lungs to heart. X, Y, Z are:
Which of the following statement is correct? I. Arteries carry oxygen-rich blood from the heart to all parts of the body. II. Veins are the vessels which carry carbon dioxide-rich blood from all parts of the body back to the heart.
Consider the following statements about arteries A. Arteries are the blood vessels which carry oxygen rich blood from the heart to all parts of the body at a high pressure B. To ensure that the blood flows only from the heart to other body parts, the arteries have valves C. The walls of the arteries are comparatively thin The correct statement is/are
In the question two statements are given, followed by two conclusions, I and II. Read all the conclusions and then decide which of the given conclusions logically follow/s from the given statements. Statements: All white blood cells are red blood cells. Some blood cells are red blood cells. Conclusions: I. All blood cells are red blood cells, is a possibility. II. Some red blood cells are not blood cells.
S1:The heart is pump of life.
P :They have even succeeded in heart transplants.
Q :Nowadays surgeons are able to stop a patients heart and carry out complicated operations.
R :A few years ago it was impossible to operate on a patient whose heart was not working properly.
S :If heart stops we die in about five minutes.
S6:All this was made possible by the invention of heart-lung machine.

The Proper sequence should be: