These two concepts of endocytosis and exocytosis are fairly simple. Cytosis is a transportation mechanism for large molecules to move in and out of cells.

Endocytosis is a process for moving items that are outside of the cell into the cytoplasm of the cell.

Exocytosis is a process for moving items from the cytoplasm of the cell to the outside.

Below is a video clip that explains the process of endocytosis and exocytosis. Mr. C showed in class. It is on youtube so you might need to turn on your vpn to watch.
Important Misconception
The process of endocytosis and exocytosis involves the formation and discharge of vesicles. There are different forms of endocytosis for absorption of different form of substances, which we are not expected to know. 



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