Epithelial Cells and Tissue

Squamous Cell

Cuboidal Cell

Columnar Cell

Cell poetry

I am a nucleus.
I am filled with information, like DNA.
Then, I command for certain things to be done.
To who? To other's with certain roles, like organells.
Oh yes, I am a nucleus.

What I don't understand are the planes. They confuse me. Sagittal and frontal throw me off and I would like to work on planes more.

What I already knew are the a cell, its structure and what is within it.  Also, I know how all body systems work, suck as the reproductive, nervous, etc.