Cells Plant and animal

There are trillions of cells in your body right now, working together so you can function correctly. They supply your body with energy and fight off diseases. But what is inside a cell? Why do they do what they do?

The Cell Theory states 3 things

1. All organisms are composed of one or more cells.

2. The cell is the basic unit of structure and organisation in organisms

3. All cells come from pre-existing cells.

An Animal Cell

The Nucleus and the Nucleolus:

A cell's nucleus is surrounded by a thin wall called the nuclear membrane, and it protects the nucleus. The DNA of a cell is stored inside the nucleus, and it is often referred to The nucleolus is contained inside the nucleus, and it creates ribosomes to send to the rough Endoplasmic Reticulum.

Cell membrane:

All cells are contained by a cell membrane. The cell membrane is not indestructible, it lets particles come in and out. It encloses all the organelles in one area so they can work together to make energy, fats and proteins.


Enzymes made of proteins are used to help speed up biological processes. Other proteins support cell functions and are found embedded in membranes. Proteins even make up most of your hair. When a cell needs to make proteins, it looks for ribosomes. Ribosomes are the protein builders or the protein synthesizers of the cell. They are like construction guys who connect one amino acid at a time and build long chains.

Golgi apparatus:

The Golgi apparatus or Golgi complex is found in most cells. It is another packaging organelle like the endoplasmic reticulum (ER). The Golgi apparatus gathers simple molecules and combines them to make molecules that are more complex. It then takes those big molecules, packages them in vesicles, and either stores them for later use or sends them out of the cell.


Created with images by tpsdave - "oregon wood river marsh water"

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