I'm an American man in his here to see what you all are up to and posting. This is a place to come explore and have fun. It is filled with images of things I enjoy and find interesting. I hope that you enjoy them too.
This image shows the exchange of oxygen and carbon dioxide of a red blood cell. The first image is the carbon dioxide being picked up at the tissue. The second image is the pickup of oxygen in the lungs (alveoli).