Red blood cell
From Wikipedia, a free encyclopedia written in simple English for easy reading.
Red blood cells are cells that are in blood. Red blood cells are red, and blood also looks red. Red blood cells are also called red blood corpuscles or erythrocytes.
The most important thing is that red blood cells carry oxygen. They catch oxygen in lungs, run through blood vessels, and bring oxygen to all other cells.
This short article can be made longer. You can help Wikipedia by adding to it.