RVHS biology team will be doing a unit on health choices in early May; we're thinking about a simulation in which the user chooses:
1. Caloric intake
2. Calorie burn
3. Type of intake (fiber/fat/protein/nutrition)
4. User chooses time scale (months/years)

and observes the effect on:
1. VO2 max
2. Blood pressure
3. BMI
4. physical appearance of the body
5. weight?

We may also be able to show the mechanism for some of this, including:
1. flow speed in small intestine
2. fat particle uptake/absorption in small intestine
3. muscle or fat building up

This simulation could also extend to showing the effects of drugs, alcohol, etc on the nervous, respiratory, urinary systems, and STDs on the immune and reproductive systems. 

Initial Literature Search:

Web-HUMAN
web interface, numeric only
http://placid.skidmore.edu/human/parseit.cgi

JavaMan
java interface, lots of features, hard to use or visualize
http://www.health.adelaide.edu.au/paed-anaes/javaman/

Teaching physiology through simulation of hemodynamics
(haven't read it)
http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel2/359/3861/00144303.pdf?temp=x

Simulation Software in a Life Sciences Practical Laboratory.
(haven't read it)