i need to know what a vesicle of an animal cell is and it would be nice to have an anology for it (a comparison between the function but different things)

http://www.newton.dep.anl.gov/askasci/zoo00/zoo00296.htm

A vesicle in an animal cell is a small, membrane-bound sac that carries and transports various substances within the cell. It is like a tiny bubble made up of lipid bilayers, similar to the cell membrane.

To understand the function of a vesicle, let's use an analogy: think of a vesicle as a small package or delivery vehicle within a busy city. Just like a vesicle, it has a membrane (similar to the lipid bilayers) that encloses the contents.

Now, imagine that this delivery vehicle is responsible for moving different items such as packages, letters, and supplies within the city. Similarly, vesicles transport different substances such as proteins, lipids, enzymes, and even waste products within the cell.

Just as the delivery vehicle transports its cargo to specific locations in the city, vesicles also have specific destinations within the cell. They can transfer substances between the different compartments of the cell, such as the Golgi apparatus or the endoplasmic reticulum.

So, you can visualize a vesicle as a small, efficient delivery vehicle transporting goods within a city, with the cell being the city itself. This analogy helps to understand the role and function of a vesicle in an animal cell.