Reaction Timer allows you to precisely quantify a person's reaction time by recording how quickly they can flex their muscles in response to a stimulus, Stimulate with two different colors of light in 3 different locations to test for visual reaction time
Rear Organs Of The Upper Abdomen, The upper abdomen organ model shows the duodenum (partially opened), gall bladder (opened) and bile ducts (opened), the pancreas (revealing large ducts), the spleen and the surrounding vessels in natural size