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Eukaryotic Cells - Endomembrane System

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Estimated time: 3 minutes
CBSE: Class 12

Key Points: Endomembrane System

  • The endomembrane system includes endoplasmic reticulum (ER), Golgi apparatus, lysosomes, and vacuoles, which work together in a coordinated manner.
  • Endoplasmic Reticulum (ER) is a network of membranous tubules that divides the cell into luminal and extraluminal compartments.
  • Rough ER (RER) has ribosomes and is mainly involved in protein synthesis and secretion, while Smooth ER (SER) lacks ribosomes and helps in lipid and steroid synthesis.
  • The Golgi apparatus consists of stacked cisternae and modifies, packages, and transports materials received from the ER.
  • The Golgi has a cis (forming) face that receives materials and a trans (maturing) face that sends them to their destination.
  • Lysosomes are membrane-bound vesicles containing digestive enzymes and perform intracellular digestion, hence called “suicidal bags.”
  • Vacuoles are membrane-bound sacs that store water, waste, and other substances, and in plants, they help maintain turgor pressure.

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Cell Unit of Life part 13 (Nucleus: Nucleolus,Nuclear membrane, Chromatin) [00:18:51]
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