What is a limitation of Jillian's cell model?

Jillian made a model of an animal cell. She used a round

balloon to represent the cell membrane She pushed

objects like marbles and rocks into the balloon to show cell

parts, then filled it with water to show fluid inside the cell

It does not make up the tissues of a living thing,

It does not show the functions of the cell parts,

It is larger than a real animal cell,

It is more complex than a real animal cell.