Which of the following statements is correct regarding veins ?

Options

A. Carry blood from an organ towards the heart
B. All veins carry oxygenated blood with single exception
C. Carry blood from heart towards the organ
D. all of these

Answer

To determine the correct statement regarding veins, let's analyze the information step by step:

### Step 1: Understanding the Function of Veins
Veins are blood vessels responsible for carrying blood back to the heart. They primarily transport deoxygenated blood from the tissues to the heart.

**Hint:** Remember that veins are involved in returning blood to the heart, not sending it away.

### Step 2: Identifying the Type of Blood Carried by Veins
Most veins carry deoxygenated blood, which is blood that has delivered its oxygen to the tissues and is now returning to the heart. The only exception is the pulmonary vein, which carries oxygenated blood from the lungs to the heart.

**Hint:** Consider the role of the lungs in oxygenating blood and how that affects the type of blood carried by veins.

### Step 3: Evaluating the Statements
1. **Statement 1:** "It carries blood from an organ towards the heart."
- This statement is correct because veins transport deoxygenated blood from various organs and tissues back to the heart.

2. **Statement 2:** "All veins carry oxygenated blood with a single exception."
- This statement is incorrect. Most veins carry deoxygenated blood, with the pulmonary vein being the only exception that carries oxygenated blood.

3. **Statement 3:** "It carries blood from the heart towards the organs."
- This statement is also incorrect. Arteries are the vessels that carry blood away from the heart to the organs.

### Step 4: Conclusion
Based on the evaluation of the statements, the correct statement regarding veins is that they carry blood from an organ towards the heart.

**Final Answer:** The correct statement is: "It carries blood from an organ towards the heart."

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