What are these living units called cells? Much like mini-fiefdoms, cells have all the equipment and expertise necessary to carry out the functions of life. A cell can eat, grow, and move.

What are these living units called cells? Much like mini-fiefdoms, cells have all the equipment and expertise necessary to carry out the functions of life. A cell can eat, grow, and move.

Bacteria are amongst the simplest of organisms - they are made of single cells. Their cell structure is simpler than the cells of animals, plants and fungi. Size Most are 5 μm - 100 μm.

Your body is made of cells -- trillions of them. Cells are the basic building blocks of people and all other living things. Researchers study them to learn more about health and diseases.