HealthyPopular.com provides
useful information on health, fitness, alternative medicine,
animal health, dentistry, fitness, health insurance, long term
care, nutrition, weight loss & yoga.
Grossology
devoted to the science of really gross things relating to bodily functions: snot, farting, smelly feet etc.
Harvey Project
international collaboration to build an interactive human physiology course on the web. Materials are available to any educational institution.