The main portion of all cells is fi

The main portion of all cells is filled with a fluid material. Just like a human body,the interior of the cell contains food,waste material or even extra water. On the outside of all cells is a protective covering called a membrane. It is just like the shell of an oyster.Sometimes cells divide in half,forming a new cell. In other words,one cell splits in half and an exact duplicate forms.Now there are two cells.When we are growing as a baby,cell division is responsible for much of our growth.