| Answer | Crossword Clue |
|---|---|
| PIA | ... mater, part of the brain. |
| DURA | .... mater (brain part) |
| PIA | ... mater (brain part) |
| arachnoid | of or relating to a thin membrane of the brain and spinal cord that lies between the dura mater and the pia mater |
| arachnoids | A fine, delicate membrane, the middle one of the three membranes or meninges that surround the brain and spinal cord, situated between the dura mater and the pia mater |
| subarachnoid | Denoting or occurring in the fluid-filled space around the brain between the arachnoid membrane and the pia mater, through which major blood vessels pass |
