Give the location and function of iter.

Explanation

### Step-by-Step Solution:

1. **Understanding ITER**:
- ITER stands for "interventricular foramen" or "foramen of Monro," which is a narrow cavity in the brain.

2. **Location of ITER**:
- ITER is located in the mid-brain region of the brain.
- Specifically, it is situated between the third and fourth ventricles.
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