Lysosome

Single membrane bounded vesicle pinched off from the releasing face of Golgi Apparatus.

NOT secretory vesicle! They are retained in the cytoplasm.

Function:

1. Breaking down unwanted molecules.
2. Digesting material taken up from outside
   
3. Breaking down worn -out organelles
4. Destroying the whole cell when the cell is severely damaged
   
5. reabsorbing unnecessary tissue by releasing enzyme outside the cell.