Take part in the activities below. Film about the research WATCH this 15-minute film from EuroStemCell for an introduction to the world of stem cell research. Windpipe transplant WATCH and READ this news item from the BBC in 2008. What were the four stages in this windpipe transplant? Heart valves from stem cells WATCH this video clip from the journal Nature and READ the accompanying article. Can you identify any ethical considerations for this technology? Watch > Watch and Read > Watch > Now it's time to test yourself >