Let's examine the true variability found in even our own bodies... not to mention for now the variability found in all of life on Earth. We really need to get past the idea that all cells look like this worn-out model:
Check out THIS
Scan through all of the human cell types listed here to get a feel for the entire system. Take in the sheer variety of celltypes required to make your body function and maintain homeostasis. Then... find two cell types that seem particularly interesting or important to you. Read about that type and then return here to summarize that type for the rest of us.
Find a celltype that either contains a good deal of detail, or even better... research that celltype on other sites on your own. Where is it found? What does it do? Why is is particularly important or interesting to you, or anyone? Tell us about this celltype and why it matters... and do it in your own words. Yes, you will likely have to use a significant amount of terminology depending on which you choose, and that is ok. Just talk it down to a conversational level.
Difficulty level: your cell types must be unique. No one can use a type that has already been described in this thread.
ps- this little model
of a generic cell really is
nicely done... check it out.