The trillions of cells in a body combine to create one living being. In all animals, similar cells group together to form four different types of tissue.
5:01 · Life Science
How does one tiny cell grow into a whole new person? Through a process called mitosis. Each human cell has 23 pairs of chromosomes. That’s 46 altogether. These carriers of genetic information copy themselves over and over. During mitosis, a cell splits in two. The two new cells are exactly like the “parent” cell and each other.