All I Need to Know...

...is that, "The heart is a pump," and "blood goes round and round."
"The lungs are a bellows" and "air goes in and out."
When the body deviates from these two principles then it's a bad thing.

I think I got it (plus about 300+ pages of notes to accompany these two ideas).

Maybe I'm ready for tomorrow's test and the next day's and the next day's...