This is the dura mater (Latin for "tough mother").
it is cytoplasm
membranes
synthesis of the cell's membranes
I think it is called the "rough endoplasmic reticulum"
Rough Endoplasmic Reticulum
Rough endoplasmatic reticulumRough endoplasmic reticulum
The rough endoplasmic reticullum is continuous with the nuclear membrane. It is a stack of membranes with ribosomes attached to the surface in the vicinity of the nucleus.
its a rough endoplasmic reticulum.
Rough ER
The rough endoplasmic reticulum synthesizes membranes.
They are constructed of interrelated membranes
They are rough ER.Other ER with no ribosomes are smooth ER