Our school's security guards act as the cell membrane by letting authorized people and vehicles in and out while keeping strangers out, similar to how a cell membrane regulates what enters and exits the cell. The teachers' room is a small, cozy space where teachers can go during breaks from teaching, serving the same purpose as a vacuole stores things a cell needs; it holds teachers not currently teaching, just as a vacuole holds cell components when not in use. The document makes an analogy between the school's security guards and teachers' room to a cell's membrane and vacuole.

1. Security- Cell
Membrane
Our school is protected by our
friendly security guards who
surround the building. The
guards act as are school's "cell
membrane." They let in and out
the people and vehicles who
should be going or coming and
don't let in strangers, just like a
cell membrane lets in and out
things that the cell should be
keeping or releasing.

2. Teachers' Room
We have a small and cozy teachers' room that our
teachers can go to when they're not busy
teaching. The teachers' room is like the vacuole of
an animal cell. It's small and it's where our
teachers who are not needed in the class at that
time go, just like things needed in an animal cell
are stored in a vacuole.