TED Talks
Susan Solomon: The promise of research with stem cells
Calling them "our bodies' own repair kits," Susan Solomon advocates research using lab-grown stem cells. By growing individual pluripotent stem cell lines, her team creates testbeds that could accelerate research into curing diseases --...
Crash Course
The Heart, part 2 - Heart Throbs: Crash Course A&P
Today we're talking the heart and heart throbs -- both literal and those of the televised variety. Hank explains how your heart's pacemaker cells use leaky membranes to generate their own action potentials, and how the resulting...
Khan Academy
Khan Academy: Changing the Pv Loop: What Is Contractility?
Contractility tells us how many myosin heads are working at the end of systole; a number that goes up or down with the level of sympathetic nerve stimulation. Rishi is a pediatric infectious disease physician and works at Khan Academy....