0 a network of tubes within a cell that transports substances inside the cell and is needed for the production of proteins --
1 a network of tubes within a cell that transports substances inside the cell and is needed for the production of proteins (= chemicals that are a necessary part of cells of living things) --
The ' factories ' of crystalline material are comprised from seemingly specialized mitochondria and rough endoplasmic reticulum elements.
The cell cytoplasm consists of few mitochondria, granules, endoplasmic reticulum, and vesicles.
The gland contains glycogen deposits, and rough endoplasmic reticulum distended into cisternae with granular material.
The rachis cytoplasm contains mitochondria, extensive rough endoplasmic reticulum, and electron-dense granules.
Two layers of membrane, derived from the endoplasmic reticulum, are incorporated as internal lipid membranes.
Note the granular appearance of the cytoplasm and the presence of areas of expanded granular endoplasmic reticulum (gar).
Concentric-whorled membranes, having a granular appearance resembling the ribosomes of rough endoplasmic reticulum, float in the pseudocoelom between somatic muscles, reproductive tract and intestine.
One interesting protein is calreticulin, a calcium-binding protein that, in mammals, is normally located in the endoplasmic reticulum.
