TYPES OF LYSOSOMES
(1) Primary Lysosomes or storage granules or protolysosome - The primary lysosomes are smaller in size, they contain hydrolytic enzyme in the form of granules. It contains Acid Hydrolases in inactive form.
(2) Secondary lysosome or digestive vacuoles or Heterophagosomes - When primary lysosome fuses with phagosome then secondary lysosome is formed.
(3) Tertiary lysosome or residual bodies or Telolysosomes - Lysosomes containing undigested material. These may be eliminated by exocytosis.
(4) Autophagic Lysosomes or Cytolysosomes or Autophagosomes - Lysosomes that digest dead or odd cell organelles is called autophagosomes. These are formed during starvation.