<p>The round globule at the left of Figure 1 is the nucleus. Again, this is characteristic of all animal and plant cells. Each nucleus, as we shall see in Chapter 5, contains a digitally coded database larger, in information content, than all 30 volumes of the <i>Encyclopaedia Britannica</i> put together. And this figure is for <i>each</i> cell, not all the cells of a body put together.</p> <p>The rod at the base of the picture is one single cell. The total number of cells in the body (of a human) is about 10 trillion. When you eat a steak, you are shredding the equivalent of more than 100 billion copies of the <i>Encyclopaedia Britannica</i>.