What does the elbow in the toilet look like?
It is a 90 Degree fitting (right angle.)
In order to hold water in the toilet bowl (and prevent unpleasant smells from coming into the bathroom) there is an elbow in the toilet. After you see the water go down the toilet, it then travels upwards through the elbow and then back down again into the drain line. The toilet clogs when things are too big to travel freely through the elbow.
No, the fingernail is distal to the elbow. Imagine a body standing with arms and legs spread out, like Da Vinci's Vitruvian Man. To determine if a part is distal or proximal to another part, look to see if it is closer or farther from the center of the body relative to the body part you are comparing it to. The fingernail is farther from the center of the body than the elbow, so it…
You can change any regular toilet for a handicapped, or ADA toilet. I have done it many times in houses and in Mobile Homes. The basic difference is the ADA approved ones are 2" higher. - Every major toilet manufacturer makes such a toilet. You can also buy raised seats by many manufacturers. -Look on sites like e-Bay for examples. These lock onto the toilet and some even have handles.