Originally I drew an image of a cell, but seeing as how mobile phone cameras and lightly drawn cell membranes don’t go well together, a picture from the inter-webs will have to suffice!
Let’s start simple.
The cell membrane is a semi-permeable layer. It controls what goes in, and what comes out!
Then we have the nucleus. It is where the DNA is kept, and RNA is “written” or transcribed. Nuclear pores allow proteins to enter and RNA to exit.
Next we have the ribosomes, where RNA is translated into protein. They float freely in the cytoplasm, but are also attached to the ER (or endoplasmic reticulum).
Now for the cytoplasm. It is the material between the cell membrane and nuclear envelope.
Also, there is:
The lysosome- the digestive system of the cell which breaks down molecules.
Mitochondria- the part of tissue cells which are the main source of energy for the cell.
Golgi bodies- these change molecules and divide them into smaller membranes or vesicles.
Vacuoles- the single-membrane organelles that transport.
Microtubules- the parts that function in cell division.