Remember this? And this? Check this one out:
an anatomically correct knitted heart, complete with valves and chambers. Designed by Paul Magnusson of Whidbey Island.
You can find the pattern for the heart here. Paul also designed a knitted hip replacement (scroll down for the hip) and some other neat stuff--a beautiful afghan, and even a camouflage suit! He is an interesting character and an amazing knitter. He and his wife have been knitting together for about 40 years.
Paul, thanks for the links and the permissions to post about your knitting! :-)