Which ventricles in the human brain are separated by the septum pellucidum?

• A. The lateral and third ventricles
• B. The third and fourth ventricles
• C. The two lateral ventricles
• D. The fourth ventricle and the cerebral aqueduct

Answer: (C)

Verified step by step guidance

1. Understand the anatomy of the human brain: The ventricles are interconnected cavities filled with cerebrospinal fluid (CSF) that help cushion the brain and remove waste. The main ventricles include the lateral ventricles, third ventricle, and fourth ventricle.
2. Learn about the septum pellucidum: It is a thin, transparent membrane located in the midline of the brain, separating the two lateral ventricles. It is positioned between the corpus callosum and the fornix.
3. Identify the ventricles separated by the septum pellucidum: The septum pellucidum specifically separates the two lateral ventricles, which are the largest ventricles in the brain and are located in each hemisphere.
4. Clarify the relationships between other ventricles: The third ventricle is connected to the lateral ventricles via the interventricular foramen, and the fourth ventricle is connected to the third ventricle via the cerebral aqueduct. These connections are not separated by the septum pellucidum.
5. Conclude that the septum pellucidum separates only the two lateral ventricles, and not the third or fourth ventricles, nor the cerebral aqueduct.