Cells For Kids

What are cells?

Cells are the building blocks of all living things. It is also considered as the smallest unit of life. The cell is where DNA is present where the DNA is converted to protein which then takes part in many events making life possible. Same cell types are grouped together to form tissues which then group together to form an organ and then an organ system. The cells are very small and they are not visible under the naked eye. The instrument required to see the cells is called a microscope. It was Robert Hooke who when looking at “corks” under the microscope realised that they were made of empty rooms. The called those cells as they looked liked the empty rooms where monks used to sleep in.


Do you know how many types of cells there are in the human body? It is thought that there are 200 different types of cells. Each cell and group of cells has a function to do. The cells carry out these functions through many of the cell components called organelles.

Animals Cells Structure & Functions Animation Video for Kids

Here are some of major organelles of the human cells:

Cytoplasm – Although this is not strictly an organelle, it is often listed under the organelle section. This is the jelly like substance called the cytosol that houses the rest of the cell components.

Nucleus – The nucleus is considered as the command centre of the cell. The nucleus contains DNA (the hereditary material) that is translated to proteins which then carries out the activities of the cell.

Endoplasmic Reticulum (ER) – There are two types of ER, the rough ER and the smooth ER. The rough ER has ribosomes attached to it while the smooth ER doesn’t. When seen under the microscope, it looks like a net or mesh like structures. The ribosomes on the ER are responsible for making proteins. The smooth ER has a role in cholesterol and carbohydrate metabolism. Other roles the ER include things like transporting molecules from one part of the cell to another.

Ribosomes – These are structures that make protein. They are found either freely in the cytoplasm or bound to the endoplasmic reticulum.

Golgi apparatus – The role of the Golgi apparatus also known as Golgi bodies is to pack molecules made by the ER and transport it outside of the cell.

Lysosomes – These are vesicles that contain digestive enzymes. When the cell is invaded by bacteria, these enzymes attempt to destroy the bacteria hence protecting the cell.

Mitochondria – the mitochondria is the power house of the cells. It is here where energy is made from food for the cell to use.

Cells Cells - Parts of the Cell Rap

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