How do you tell cells from what they look like?

Question: How do you tell cells from what they look like?
- Keywords:
  cell
Asked by maria1 to Derek on 17 Jun 2011.
- Derek McKay-Bukowski answered on 17 Jun 2011:
  
  I assume that you mean plant and animal cells, right?
  
  There are various cells that I would recognise because of their shape. For example, blood cells like like small round jelly sweets! Also some by colour.
  
  However, I am certainly NOT an expert on cell recognition. That would be something for a biologist, like Tim, Sarah or Dalya.

Question: How do you tell cells from what they look like?