Here is an online veterinary manual from Merck that contains A LOT of information.  Of particular interest to me is the section on Emergency Medicine and Critical Care although the manual covers everything from temperature, heart rate and resting respiratory rate reference guides to congenital and inherited anomalies of every bodily system.  Although there is a large amount of information that probably doesn’t have any significane to pet owners with dogs and cats, such as this section or even this one, there are just as many sections that offer us useful information.  Next time you have an interest in anything veterinary I recommend you give this manual a chance to provide you with the information you’re looking for.  Do a search of the manual rather than a search of the web; you will receive comprehensive, dependable results.  A link to The Merck Veterinary Manual will always be available via the logo in the middle column of this site and I encourage you to bookmark this trusty resource!