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The ventricles of the brain are a communicating network of cavities filled with cerebrospinal fluid (CSF) and located within the brain parenchyma. The ventricular system is composed of 2 lateral ventricles, the third ventricle, the cerebral aqueduct, and the fourth ventricle (see the following images).
In total, there are four ventricles; right and left lateral ventricles, third ventricle and fourth ventricle. Lateral Ventricles. The left and right lateral ventricles are located within their respective hemispheres of the cerebrum. They have âhornsâ which project into the frontal, occipital and temporal lobes.