Unicellular organisms<span> contain one cell and all of their functions are based on that one cell whereas </span>multi-cellular organisms<span> contain more than one cell and there functions are divided amongst different cells like nervous cells, cardiac muscle cells etc.
</span>Multi-cellular organisms<span> can be much larger and more complex. This is because the cells of the</span>organism<span> have specialized into many </span>different<span> types of cells such as nerve cells, blood cells, muscle cells all performing </span>different<span> functions.</span>
