GENERAL HISTOLOGY

Detailed explanation-1: -The subarachnoid space is the cerebrospinal fluid-filled space that exists between the arachnoid and the pia. Within the lateral ventricles of the brain, the choroid plexus produces CSF, which passes into the subarachnoid space via the foramina of Luschka.

Detailed explanation-2: -Anatomically, the subarachnoid space exists between the arachnoid mater externally and pia mater internally. A network of fine delicate connective tissue called trabeculae connects these two layers and gives this space its characteristic spider web appearance.

Detailed explanation-3: -The space under the arachnoid, the subarachnoid space, is filled with cerebrospinal fluid and contains blood vessels. The pia mater is the innermost layer of meninges.

Detailed explanation-4: -The meninges separate three spaces called the epidural space, subarachnoid space, and the subdural space. Each of these spaces contains some important blood vessels, rupture of which can cause headache. The epidural space is a potential space located between the inner surface of the skull and the tightly adherent dura.

Detailed explanation-5: -The subarachnoid space is filled with CSF which is produced by the choroid plexus within the ventricles of the brain. CSF flows through the ventricles of the brain and is received into the subarachnoid space from the fourth ventricle via the posterior cerebellomedullary cistern.