PIA MATER • E-FREE TRANSLATION.COM • Definition of Pia mater

... anastomosis between the vessels entering into the formation of the circulus arteriosus (circle of Willis) ensures an abundant supply of blood to the brain. The larger arteries run in the sub-arachnoid space and give off branches which ramify in the pia mater before entering the cerebral substance. Within the brain, each artery being more or less terminal, there is no free anastomosis between adjacent vessels, with the result that if any individual artery is obstructed the vitality of the area supplied by it is seriously ...

— Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. • Alexander Miles

... in which the hair was kept, while a boy or young man's parents were alive, parted into two tufts from the pia mater, and brought down as low as the eyebrows on ...

— The Shih King • James Legge