After posting a video we found on Vine of healthy lungs vs. smokers' lungs, we realized that videos are a great way to solidify concepts! So for any Nursing Students who need a concept or diagnosis broken down in an easy way, or people just looking for some info on common conditions, we found a great series of videos on Youtube from "DoctorsSecrets". Check out this one that describes ulcers, how they form, common causes and treatments.