Pia mater

Definition

The pia mater is the delicate innermost layer of the meninges that directly covers the brain and spinal cord. It provides a protective barrier and aids in the production of cerebrospinal fluid.

5 Must Know Facts For Your Next Test

1. The pia mater is one of three meningeal layers, with the other two being the dura mater and arachnoid mater.
2. It closely follows the contours of the brain, including its sulci and gyri.
3. The pia mater contains many blood vessels that supply oxygen and nutrients to the nervous tissue.
4. It plays a crucial role in forming the blood-brain barrier along with astrocytes.
5. Damage or infection to the pia mater can lead to conditions such as meningitis.

Review Questions

• What are the three layers of meninges, and where does pia mater fit among them?
• How does the pia mater contribute to maintaining neural health?
• What could be potential consequences if the pia mater is damaged or infected?

Related terms

dura_mater: The tough outermost layer of the meninges that protects the central nervous system.

arachnoid_mater: The middle layer of meninges situated between dura mater and pia mater, containing a web-like structure filled with cerebrospinal fluid.

cerebrospinal_fluid: A clear fluid found in the brain and spinal cord that provides cushioning, removes waste, and circulates nutrients.