Pia mater
System
Nervous
SNOMED CT
362305004
Pia mater
Definition
The innermost layer of the leptomeninges, consisting of a delicate membrane closely covering the surface of the brain and spinal cord,and lying under the arachnoid membrane. The pia, unlike the arachnoid, extends into the sulci in gyrencephalic animals.
Also known as pia mater of neuraxis, pial membrane — per UBERON
The Pia mater is a part of the Nervous.