Its size reflects its need to contain enough nutrients to feed the developing ostrich chick. Most plant and animal cells range in size between 10 and 50 micrometers. The longest cells are nerve cells that can sometimes extend several feet. Their function is to carry electrical impulses through the body quickly. Compare these to prokaryotic bacteria, which, at .2 micrometers in length, are the smallest cells.
Some cells can live independently of other cells.
Other cells are highly specialized and can function only in association with many others as part of a multicellular organism. So get ready to take a tour though this fascinating and sometimes bizarre cellular world that can be seen only with a microscope. The first stop is a factory. Inc. All rights reserved.