EVERYDAY SCIENCE

Detailed explanation-1: -Iter, also known as the aqueduct of Sylvius, is present between the third and fourth ventricle. It is found in the mesencephalon region (midbrain) and connects the third ventricle with the fourth ventricle to allow the flow of cerebrospinal fluid within the mesencephalon and metencephalon regions.

Detailed explanation-2: -The cerebral aqueduct between the third and fourth ventricles is very small, as are the foramina, which means that they can be easily blocked.

Detailed explanation-3: -The cerebral ventricular system is made up of 4 ventricles that include 2 lateral ventricles (1 in each cerebral hemisphere), the third ventricle in the diencephalon, and the fourth ventricle in the hindbrain. Inferiorly, it is continuous with the central canal of the spinal cord.

Detailed explanation-4: -The cerebral aqueduct is a narrow 15 mm conduit that allows for cerebrospinal fluid (CSF) to flow between the third ventricle and the fourth ventricle.

Detailed explanation-5: -Iter is the passage between the third and fourth ventricles in the brain, the cerebral aqueduct or aqueduct of Sylvius.