Endoplasmic Reticulum
Definition: System of intercommunicating channels [Cisternae] Forming reticulum [Network] in cytoplasm
Rough Endoplasmic Reticulum >> Site Protein forming cells: Plasma cells, Osteoblasts & Pancreas
-:Functions
1Synthesis of protein by ribosomes >>2-Transfer of protein to Golgi apparatus through transfer vesicles >>3-Formation of enzymes of lysosomes >>4-Intracellular pathway
L.M Basophilic cytoplasm [due to rRNA]
E.M Reticulum of parallel intercommunicating cisternae with attached ribosomes Rough outer surface
Smooth Endoplasmic Reticulum >> Site Lipid forming cells: Liver Endocrine glands: Suprarenal cortex
L.M If abundant >> acidophilic cytoplasm [Normally not seen by L.M]
E.M Reticulum of anastomosing cisternae without ribosomes >> Smooth outer surface
Functions -Synthesis of Lipid >>2-Synthesis of steroid hormones >>3-Storage of glycogen [in liver & muscles] >>4-Helps muscle contraction by Ca pump >>5-Detoxification of drugs [in liver]
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