Convincing someone you are right
Biomechanics is an area of study
wherein knowledge and methods of mechanics are applied to the structure and
function of the living human system. Period is a biomechanical term that refers
to the amount of time required for an object to complete single cycle of motion.
Blood is blue before it reaches oxygen. this is why your veins are blue
This is heavily disputed, and honestly, it varies on a person-by-person basis. Some people are visual learners (so it's effective for them to use videos and pictures to help them study), some prefer being hands-on, etc...
Generally though, I'd say the most effective method that works for most people is through visceralisation. This is the process of associating concepts, words. phrases etc. with your different senses (sound, touch, images...). You can read up more on it by searching up "visceralisation for studying".
Speak slowly, clearly, and loudly
Allow extra time for older patients
Be gentle