Answer:
okay, I'm a teen and I know many people who believe weird stuff
okay, Many of my friends believe that all carbs and fats are bad and also math will mess up your brain. they also believe that if you're wearing glasses and know a lot of math, then you're a nerd. whats up with that
A doctor that studies cardiology knows a lot of the hearts aorta, atria, valves, and ventricles.
let me know if you have any other questions
:)