Why there are limits on the size of cells?

1. Cells are limited by the resources available to them. 2. The cell has to efficiently transport nutrients into it. 3. Because cells try to maintain a certain size, at some point they can no longer grow larger and they make the decision to divide. [For single-celled organisms like bacteria, algae, or yeast, this decision is mainly based on the availability of food.] 4. For cells that are part of a multicellular organism (like you are!) the decision to divide is more complex. There usually isn't a shortage of nutrients, but there may be a shortage of space. [For multicellular organisms, it would be bad if cells divided uncontrollably. In fact, uncontrolled cell division is what cancer is.] 5. They must receive signals from cells around them to divide and check if the DNA is damaged.