Lysosomes are a membrane-bound organelle found in many animal cells. They are spherical vesicles containing hydrolases that break down many biomolecules. The pH of the lysosome in the range of 4.5 to 5.0 is optimal for the enzyme involved in the hydrolysis. Lysosomes perform waste treatment functions by digesting unused or unused materials from the cytoplasm inside and outside the cell. Among them, substances from outside the cell are absorbed by endocytosis, while substances from inside the cell are digested by autophagy. https://www.creative-diagnostics.com/blog/index.php/lysosomal-storage-disease/