Cells, Tissues and Organs
As we mentioned before, cells are the building blocks of life.
When we have a group of similar cells working together this is called a tissue, for example muscle tissue is made up of lots of muscle cells. All the cells in a tissue look the same and perform the same job.
A group of different tissue working together to do a specific job is known as an organ, our heart, stomach, lungs are all organs.
Different organs working together form an organ system, our heart and blood vessels work together as part of our circulatory system.
All of our organ systems put together make up a living organism and that is you!