Answer: They are all connected .
All living organisms on Earth are divided into cells. The main concept of cell theory is that cells are the basic structural unit for all organisms. Living things may be single-celled or they may be very complex such as a human being. There are smaller pieces that make up cells such as macromolecules and organelles. A mitochondrion is an example of an organelle. If you were only made of one cell, you would be very limited. You don't find single cells that are as large as a cow.
Explanation ; easier so you can understand :)
We are made up of cells . The cell theory is that cells are what we are made of and the other animals and things in the world. Everything is made out of cells. The things that make up cells are orgenelles. That is how they are all linked up. Human > cells > oragenelles.
hope that helped :)