Which of these statements about the kidney and urinary bladder is CORRECT?

Options

A. The kidney lies posteriorly in the abdominal cavity while the urinary bladder lies anteriorly in the pelvic cavity.
B. The kidney lies anteriorly in the abdominal cavity while the urinary bladder lies posteriorly in the pelvic cavity.
C. The kidney lies posteriorly in the abdominal cavity while the urinary bladder lies posteriorly in the pelvic cavity.
D. The kidney lies anteriorly in the abdominal cavity while the urinary bladder lies anteriorly in the pelvic cavity

Answer

To determine which statement about the kidney and urinary bladder is correct, we will analyze the anatomical positions of both organs in the human body.

### Step-by-Step Solution:

1. **Understand the Location of the Kidneys**:
- The kidneys are located in the posterior part of the abdominal cavity. They are situated towards the back of the body, specifically against the posterior abdominal wall.

2. **Understand the Location of the Urinary Bladder**:
- The urinary bladder is located in the pelvic cavity, which is situated anteriorly (in front of) the pelvic cavity. It is positioned below the abdominal cavity and in front of the pelvic bones.

3. **Evaluate Each Statement**:
- **Option A**: "The kidney lies posteriorly in the abdominal cavity while the urinary bladder lies anteriorly in the pelvic cavity."
- This statement is correct based on our understanding of the anatomical positions.

- **Option B**: "The kidney lies anteriorly in the abdominal cavity."
- This statement is incorrect because the kidney is located posteriorly, not anteriorly.

- **Option C**: "The kidney lies posteriorly in the abdominal cavity, and the urinary bladder lies posteriorly in the pelvic cavity."
- This statement is partially correct; while the first part about the kidney is true, the urinary bladder is not posterior but anterior in the pelvic cavity.

- **Option D**: "The kidney lies anteriorly in the abdominal cavity."
- This statement is incorrect as the kidney is located posteriorly.

4. **Conclusion**:
- After evaluating all the options, we find that **Option A** is the only correct statement regarding the anatomical positions of the kidney and urinary bladder.

### Final Answer:
**The correct statement is Option A: The kidney lies posteriorly in the abdominal cavity while the urinary bladder lies anteriorly in the pelvic cavity.**