Question

Which of the following connects the lateral ventricle of diocoel in the brain with the third ventricle?
A. Iter
B. Foramen of Monro
C. Corpus striatum
D. None of the above

Answer 1

Hint: A set of four cavities called ventricles in the brain which are interconnected is called the ventricular system. Cerebrospinal fluid is secreted by the choroid plexus preset in each ventricle. From the fourth ventricle, the ventricular system is connected with the central canal of the spinal cord.

Complete answer: Brain is considered as the master organ of the body. It forms a part of the central nervous system along with the spinal cord. The human brain consists of the cerebrum, cerebellum, and brain stem. The brainstem is composed of pons varolii and medulla oblongata. The deep structure of the brain is the ventricle. Ventricles are the cavities of the brain. There are four ventricles which are interconnected to form the ventricular system in the brain. Each ventricle consists of a choroid plexus that secrete the lubricating fluid called cerebrospinal fluid or CSF. The four ventricles of the brain are lateral brains that are present on the right and left hemisphere, third ventricle, and the fourth ventricle. There are several openings called foramina which act as channels that connect the ventricles with each other. Lateral ventricles are connected to the third ventricle by interventricular foramina. Interventricular foramina is also called Foramen of Monro. The cerebral aqueduct is the channel that connects the third ventricle to the fourth ventricle. Foramen of Monro connects the lateral ventricle of the diocoel in the brain with the third ventricle.
So, option B is the correct option.

Note: Cerebral aqueduct is also called mesencephalic duct. The CSF secreted by the choroid plexus in each ventricle acts as a shock absorber in the brain. It also maintains the pressure inside the brains and transports the required nutrients to the brain.