These are cellular organelles found in animals they have many functions including breaking down waste materials as well as cellular debris using acid hydrolase enzymes. The digestive enzymes of a lysosome works around a pH of 4.5, it is the membrane surrounding this organelle that allows for these enzymes to work at this pH. Lysosomes contains a variety of enzymes namely, protease, amylase, phosphoric acid and lipase.

Below are some common functions of lysosomes:

• Lysosomes as stated above, contains numerous amounts of enzymes, some of these enzymes are capable of digesting a wide variety of substances.
• They are capable of digesting membranes and organelles, this function is of great importance because it allows cells to remodel or replace old organelles.
• They are often called “suicide bags” because of their ability to rapidly digest an entire old cell.
• Digesting foreign bacteria and other waste substances.
• Digesting macromolecules.

The Golgi apparatus is a composition of parallel membranes enclosing the cisternae, which is a flattened fluid-like space. The cisternae are slightly curved causing the entire structure to appear concave. Unlike others the Golgi is not a stationary cell organelle it disappears at the early stages of mitosis and re-appears during the late stages. The Golgi’s main function is to process proteins that are synthesized in the Endoplasmic Reticulum. It also has other functions these are listed below.


Functions of the Golgi apparatus:

• Carries out its function of transporting and storing lipids.
• Manufactures Glycoproteins, these are required in secretions.
• The production of secretary enzymes.
• Helps in the formation of Lysosomes.

Golgi Apparatus 

(image taken from here)