Definition: Lysosomes are single-membrane vesicles, having an intermediate size between microsomes and mitochondria. These are surrounded by a lipoprotein membrane. Lysosomes contain hydrolytic enzymes like phosphatase and ribonuclease. Due to this, they are named as lysosomes (Lyso means lytic action). Lysosomes Functions are Described below:
Lysosomes are abundantly found in Eukaryotic Animal cells. They are present in the Cytoplasm of the Cell. These are membrane-bound sacs in which enzymes are present. These enzymes help in the digestion.
Lysosomes are basically single membrane-bound sac. That is filled with enzymes that help indigestion. Lysosomes are found in all eukaryotic cells. Lysosomes act as ‘garbage disposal’ of the cell. Lysosomes are sphere-shaped flattened structures. The lysosomal structure size ranges from 0.1 to 1.2μm. Meanwhile, the shape and size of lysosomes may differ in different organisms. Lysosomal enzymes are present in the membrane which surrounds the lysosomes.
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Lysosomes function is given below :
- The hydrolytic enzymes of lysosome destroy the foreign materials like pathogenic microorganism.
- After cell death, they serve to digest cell components
- Inside the macrophages, these lysosomes combine with vacuole which has engulfed the foreign particles and form phagolysosomes.
- Inside these phagolysosomes, foreign particles are degraded or killed.
- The pathogen engulfed lysosomes are destroyed by the reticule endothelial system. Due to this action lysosomes are called ‘Suicidal Bags’.
- Recycle the products of biochemical reactions that have taken place following materials being brought into the cell by endocytosis.
- Completely break-down cells that have died (autolysis) also done by lysosomes.
- Lysosomes also play a significant role in cell membrane repairing.
- Lysosomes help in creating the immune response against foreign bodies.