HI, I am a red blood cell. I will be going through the process for a red blood cell.
This is me and all of my buddies forming a tissue. Red blood cells transport all the oxygen from the lungs to the body tissue.
A red blood cell helps in the heart by the white blood cells, the white blood cells are much bigger but only a few of them, a red blood cell is smaller but there is a lot of them. I also give blood its color. Again I carry the oxygen from the lungs to the body tissues
This is me in a organ system. The organ I choose is the human lung organ. I also help carry out carbon dioxide.
I am in an organism. An organism is an individual form of life. There are lots of red blood cells in a human.