Read the following statements regarding the human circulatory system.
A . The systemic circulation provides nutrients , oxygen, and other essential substances to all the tissues including the lungs.
B. A unique vascular connection exists between the digestive tract and the liver is called the hepatic portal system.

Options

A. A is true and B id false
B. Both A and B are true
C. A is false and B is true
D. Both A and B are false

Answer

To solve the question regarding the statements about the human circulatory system, we will analyze each statement one by one.

### Step-by-Step Solution:

**Step 1: Analyze Statement A**
- Statement A claims: "The systemic circulation provides nutrients, oxygen, and other essential substances to all the tissues including the lungs."
- **Evaluation**: This statement is incorrect. The systemic circulation does provide nutrients and oxygen to all body tissues, but it does not include the lungs. The lungs are supplied by the pulmonary circulation, which is responsible for oxygenating the blood.

**Step 2: Analyze Statement B**
- Statement B claims: "A unique vascular connection exists between the digestive tract and the liver is called the hepatic portal system."
- **Evaluation**: This statement is correct. The hepatic portal system is indeed a unique vascular connection that carries blood from the digestive organs and spleen to the liver. This system allows the liver to process nutrients and detoxify substances before they enter the systemic circulation.

**Step 3: Determine the Truth Values**
- From the evaluations:
- Statement A is **False**.
- Statement B is **True**.

**Step 4: Identify the Correct Option**
- Given the evaluations, we can conclude that:
- The correct answer is that A is false and B is true.

### Conclusion:
- Therefore, the correct answer is **Option 3: A is false and B is true**.