Swimming Like a Fish

While artificial hearts, brain implants, and artificial/biotic limbs are already tomorrow's technology being used today there are some even more exciting advances on the way. I would like to fantasize a bit about enhancing our bodies to explore the world in ways we have never seen. One particular idea in development, readily studied, experimented, and commented on by one Robert Freitas, is called respirocytes. These are artificial red blood cells. It turns out our blood cells are incredible creations, however, they are severely inefficient and can be replaced and enhanced at the nano-level. These artificial blood cells would allow a more efficient use and distribution of our oxygen and other gases in our body. This would mean swimming underwater for hours without ever having to take a breath, or running a marathon while barely being winded. On another level these "nano blood cells" can capture toxins and harmful compounds we might breath into our lungs. Smoke deaths would cease to exist, though shark attacks may become more prevalent as we start to fearlessly swim through the exotic without scuba gear. This idea, this thought experiment of extending beyond physical limitations is fascinating. I invite all who read this to comment: tell us what enhancement you would like to see in the future made to our bodies, limitations that you would like extended. I have always dreamed of being able to "breath" underwater, but what else could these respirocytes mean for us mere humans as our bodies move to version 2.0. All thoughts are welcome.

Here is a link to an understanding of respirocytes for those wanting more information.....
http://www.foresight.org/Nanomedicine/Respirocytes.html