The kidneys are located

Options

A. With the coelom
B. Near the buccal cavity
C. Near the heart
D. Outside the coelom

Answer

**Step-by-Step Solution:**

1. **Understanding the Location of Kidneys**: The kidneys are vital organs responsible for filtering blood and producing urine. Their anatomical position is crucial for understanding their function and relation to other organs.

2. **Identifying the Anatomical Regions**: The kidneys are situated in the abdominal cavity. Specifically, they are located below the diaphragm, which separates the thoracic cavity from the abdominal cavity.

3. **Position Relative to the Spine**: Each kidney is positioned on either side of the spine. This bilateral arrangement is important for the symmetrical functioning of the renal system.

4. **Understanding the Term 'Coelom'**: The term 'coelom' refers to the body cavity in metazoans. In humans, the coelom is divided into the thoracic and abdominal cavities, lined by the peritoneum.

5. **Retroperitoneal Position**: The kidneys are described as being in the upper retroperitoneal region of the abdomen. This means they are located behind the peritoneal lining of the abdominal cavity.

6. **Conclusion on the Location**: Since the kidneys are positioned behind the peritoneum and not within it, they are classified as being outside the coelom. Therefore, the correct answer is that the kidneys are located outside the coelom.

**Final Answer**: The kidneys are located outside the coelom.

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