#veins

ZOOLOGY

Which of the following statements about veins is incorrect?

Not all veins carry deoxygenated blood. **Pulmonary veins** carry **oxygenated blood** from the lungs to the heart. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.

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Circulatory System - Comparative and Evolutionary Aspects

Which of the following is incorrect about veins?

Pulmonary veins carry oxygenated blood from the lungs to the heart, so not all veins carry deoxygenated blood.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects

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Circulatory System - Comparative and Evolutionary Aspects

Which of the following statements about veins is incorrect?

Not all veins carry deoxygenated blood. Pulmonary veins carry oxygenated blood from the lungs to the heart.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects

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Regulation and Disorders of Circulatory System

Which of the following is a characteristic of veins?

Veins have valves that prevent backflow and ensure unidirectional blood flow toward the heart.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System

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ECG and Blood Vessels

Which of the following prevents backflow of blood in veins?

Veins have valves to prevent backflow and ensure unidirectional blood flow.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels

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ECG and Blood Vessels

Which of the following carries deoxygenated blood?

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for oxygenation.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels

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ECG and Blood Vessels

Which of the following carries deoxygenated blood?

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for oxygenation.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels

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ECG and Blood Vessels

Which type of blood vessel has the thickest muscular walls?

Arteries have thick muscular walls to withstand high blood pressure from the heart.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation ECG and Blood Vessels

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Human Heart - Structure and Cardiac Cycle

Which of the following is incorrect about the function of veins?

Not all veins carry deoxygenated blood. Pulmonary veins carry oxygenated blood from the lungs to the left atrium.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Human Heart - Structure and Cardiac Cycle

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Blood Groups - ABO Rh System and Coagulation

Which of the following statements about veins is true?

Veins carry blood under low pressure. Therefore, they possess valves that prevent the backflow of blood and ensure one-way movement towards the heart.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Blood Groups - ABO Rh System and Coagulation

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Blood Groups - ABO Rh System and Coagulation

Which of the following is correct about veins?

Veins carry blood under low pressure and have valves to prevent backflow.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Blood Groups - ABO Rh System and Coagulation

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Blood Groups - ABO Rh System and Coagulation

Which of the following statements about veins is correct?

Veins have thinner walls than arteries because they carry blood under low pressure. However, pulmonary veins carry oxygenated blood.

Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Blood Groups - ABO Rh System and Coagulation

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