The foramen of Monro connect the lateral ventricles with the third ventricle.
Choroid is found in the ventricles(lateral, third and fourth) and it is also found leading from the lateral to the thrid ventricles going through the interventricular foramen.
through the interventricular foramina
Actually, its the foramina of Monro, not Monroe. They are channels that connect the paired lateral ventricles with the third ventricle at the midline of the brain.
lateral ventricle
interventricular foramen (or also known as "foramen of Monro")
The lateral pair of structures at the foramen magnum are the jugular foramen and the hypoglossal canal. The jugular foramen allows passage of the internal jugular vein and glossopharyngeal, vagus, and accessory nerves, while the hypoglossal canal transmits the hypoglossal nerve.
There are four cerebral ventricles: the paired lateral ventricles, and the midline third and fourth ventricles. The two lateral ventricles, located within the cerebrum, are relatively large and C-shaped, roughly wrapping around the dorsal aspects of the basal ganglia. It is in the lateral ventricles of the embryo that the successive generation of neurons gives rise to the 6-layered structure of the neocortex, constructed from the inside out during development. Each lateral ventricle extends into the frontal, occipital and temporal lobes via the frontal (anterior), occipital (posterior), and temporal (inferior) horns, respectively. The "body" and "atrium" are situated between the anterior/anterior horn and posterior horns. The lateral ventricles both communicate via the interventricular foramina with the third ventricle, found centrally within the diencephalon. The third ventricle communicates via the cerebral aqueduct, located within the midbrain, with the fourth ventricle, found within the hindbrain. The three foramina to the subarachnoid space are found here, permitting cerebrospinal fluid produced in the ventricles to surround the brainstem, cerebellum, and cerebral cortex. The fourth ventricle is also continuous with the central canal, allowing CSF to bathe the inside surface of the spinal cord as well.
lateral ventricle, third ventricles, fourth ventricles, and cerebral aqueduct
The lateral ventricles are located in the center of the brain, one in each hemisphere. They are the largest ventricles and are responsible for producing and circulating cerebrospinal fluid throughout the brain and spinal cord.
The interventricular septum is the medial partition between the lateral ventricles. It separates the oxygenated and deoxygenated blood.
arachnoid
The lateral ventricles are in the brain and connect to the third ventricle through the foreman of Monroe.