If atoms are the basic building blocks of matter, the basic building block of our body is a cell. Cells, generally like atoms to molecules, form groups called tissues which form groups called organs which form groups called systems that form our body. Cells are classified according to the tissue or organ that they form, that is heart cells, liver cells or brain cells. Furthermore, it is interesting to study cells since they are essentially a being in their own respect, considering the sophistication of their components.

Cells contain a control center, security system, power generators, walls, memory storage, historic archives, and even a self-destruction mechanism. Basically, a single cell has the ability to process miniature components of protein to power the whole cell. It also has the genetic blueprint (deoxyribonucleic acid) of its ancestors. It has a jelly-like wall that enables food to be taken in and waste excreted. This wall also gives some protection from foreign entities because it is controlled by the command center. Guards also secure the area of the cell which tries to neutralize any foreign entity that managed to breach the wall. With lysosomes, self-destruction is even possible if the cell is already too old for comfort. The core of the cell is the nucleus which controls the functions of the organelles ( or components) of the cell.

Cytology, study of cells, have been revolutionized to entertain new ideas and in fact, advanced a number of technologies such as cloning and genetic engineering. Even in forensics, cells are examined to understand DNA makeup. Small things such as cells warrant attention and care as much as big things that are visible to us.