Where is cerebrospinal fluid (CSF) formed and where is it reabsorbed?

Explanation

### Step-by-Step Solution:

1. **Formation of Cerebrospinal Fluid (CSF)**:
- Cerebrospinal fluid (CSF) is primarily formed in the **choroid plexus**.
- The choroid plexus is a network of blood vessels and cells located in the **lateral, third, and fourth ventricles** of the brain.

2. **Pathway of CSF Flow**:
- Once formed, CSF flows from the **lateral ventricle** to the **third ventricle** through an opening known as the **foramen of Monroe** (or interventricular foramen).
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