Need Idea's on Camera

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Hello-

I need to find a camera for work, probably have ~$800 to spend. The camera will be used to shoot gross anatomy, specifically heart valves as well as the entire heart within the surgical setting. We need close ups of heart valve leaflets and the coronary vessels of the heart dissected and in situ.

The pics will be used in scientific papers and blown-up to at least 8x10 for scientific posters. A number of different people will have access to the camera so it needs to be as simple as can be "point & shoot", don't need lots of features. The shots will be taken within the lab & surgical rooms under flourescent lighting.

What is necessary is a macro & supermacro capability as well as normal close pics for example of the entire chest of a person. The camera does not have to mount to a microscope. We don't want to change lenses, want it all in one with flash. I'm guessing around 5MP. The lenses are the priority with good lighting.

There are so many cameras I don't know where to begin, far too many features to make it simple. Anyone have some ideas where to start, specific brand to begin with?