creating a medical cross section of a Blood Valve in C4D?

Hi. I am trying to model and build a medical cross section of blood
pumping through a vein. I know this has been done a lot in 3D so I'm
sure there are several ways to do it. I have mograph 2 and c4d 11.

Details:
-The valve must open and close (not even sure how to model the valve??????)

- The vein starts out opaque and turns semi-transparent to where one can peak inside (see picture on right)

- The vein will have an inner wall that slowly fades away as the animation goes through

-the vein will clog at one point and the whole thing will bulge

-the vein will have red blood cells running through it (Pump action? Not sure how to approach this?)



Please see the attached picture (the one on the right) to get a better view of the viewing angle etc.

http://joelhebert.com/wp-content/upload ... ture-2.png

Any help would be greatly appreciated.

Thanks
Joel H.