part of
part of
composed primarily of
immediate transformation of
membrane organ
meninx
BTO:0000144
CALOHA:TS-1177
EFO:0000867
EMAPA:32660
EV:0100312
FMA:9589
GAID:687
In fishes, the meninges consist of a single membrane, the primitive meninx, wrapped around the brain and spinal cord. With the adoption of terrestrial life, the meninges doubled. In amphibians, reptiles, and birds, the meninges include a thick outer dura mater derived from mesoderm and a thin inner secondary meninx. (...) In mammals, the dura mater persists, but division of the secondary meninx yields both the arachnoid and the pia mater from ectomesoderm.[well established][VHOG]
MA:0001113
MAT:0000113
MESH:D008578
Membrane covering the brain and spinal cord. It is represented by a single layer in fishes, two in amphibians, reptiles and birds and three in mammals (named dura mater, arachnoid and pia mater). [TFD][VHOG]
Membrane organ that surrounds the brain and the spinal cord.
Not consider part of the CNS/neuraxis in FMA
OpenCyc:Mx4rwDOl8JwpEbGdrcN5Y29ycA
TAO:0001355
UBERON:0002360
UMLS:C0025285
VHOG:0001295
Whereas cyclostomes and fishes only have a single envelope called the primitive meninx, amphibians have two layers, consisting of an outer dura mater which is extremely dense and protective, and a pia-arachnoid or secondary meninx which is more delicate and vascular. Mammals have three meninges: pia mater (which follows all the convolutions of the brain and is the most interior), the arachnoid layer (which is delicate and sends strands to the pia mater), and the dura mater (the outer, more protective meninx).
ZFA:0001355
layer of meninges
meningeal
meningeal layer
meninx primitiva
uberon
connective tissue
ectoderm-derived structure
future meninx
structure with developmental contribution from neural crest
meningeal cluster