Question

Name the three layers of meninges.

Answer 1

Hint: The meninges are a dense network of membranous connective tissue protecting both the brain and the spinal cord. They have three layers, such as the hard outer layer, a thin middle layer that resembles a cobweb, and a thin, fragile innermost layer.

Complete answer:
There are three meninges layers including the outer layer, the dura mater, a thin middle layer called the arachnoid, and the innermost layer called the pia mater.
Dura mater is a durable, white fibrous connective tissue. It is often recognized as pachymeninx. Dura mater means "hard mother." The dura provides an extra protective shield for the brain and the spinal cord helps prevent the CNS from jostling about by fastening it to the skull or vertebral column and provides a complex system of vein drainage from which blood can exit the brain.
Arachnoid Mater is a middle meninges layer that connects the dura mater and pia mater. The arachnoid gets its name because it has a spider webs consistency and appearance. The arachnoid membrane loosely covers the brain and spinal cord and derives its name from its web-like appearance.
Pia Mater is a thin inner layer of meninges, in direct contact with the cerebral cortex and the spinal cord and is tightly protected. The pia mater has a rich supply of blood vessels to provide the nervous tissue with nutrients. Pia mater, which covers the spinal cord, consists of two layers, an outer layer of collagen fibers and an inner layer that encapsulates the entire spinal cord.

Additional Information:
Meningitis is a dangerous condition that causes meninges to become inflamed. Meningitis is usually caused by a cerebrospinal fluid infection. Pathogens such as bacteria, viruses, and fungi may be responsible for meningeal inflammation. Meningitis can cause damage to the brain, lead to seizures, and can be fatal if not treated meningiomas are nerve tissue tumors that cover the brain and spinal cord. Although meningiomas are unlikely to spread, doctors often treat them as malignant, because symptoms may develop when a tumor puts pressure on the brain.

Note: Based on their location, meninges are referred to as the cranial meninges that wrap the brain, and the spinal meninges that wrap the spinal cord. Both the meninges are continuous and consist of the same three meningeal layers.