Back in early 2020, when the world began to unravel, when I had just finished my first quarter of school, the lock-downs across the country had begun. My parents, I had both at the time, were considered vulnerable (right… remember when it only infected elderly people or people with compromised immune systems? It’ll go away in April! Like a miracle! Drink bleach!) and they were living in an assisted living facility. In fact, it’s only recently that restrictions have been relaxed, and I’ve been able to regularly visit my mother.

Anyway, I was having such a great time in school; I was particularity blown away by anatomy and physiology. The human body is an amazing machine. When our instructor first started lecturing about the roles that the cardiovascular and pulmonary systems play together, I devoured his words, scribbling furiously in my notebook. I read through the relevant chapters in our massive textbook. I was fascinated.

I wanted to tell my parents what I had learned, but that’s hard to do over the phone. So, I scribbled together these following pages and mailed my attempt to understand the human body off to them. They got a real kick out of it!

Needless to say, I was a green student, and I got plenty of things wrong in my notes. I think I got the actions of the diaphragm mixed up. I left out the other semilunar valve, the aortic valve. I did my best with the white blood cells, but I’m no biochemist. I got the test tube of blood wrong; white blood cells and platelets are actually in the middle, in a thin layer called the Buffy coat (seriously). There are also plenty of spelling and grammatical errors, and a few pages have this evening’s PB&J on them. Sorry about that.

If you manage to make it through my mangled scribbles of a new student barely understanding, and get to the part where I talk about platelets, you might notice something interesting. Platelets, the cells in your blood that form a mesh to stop bleeding, use serotonin in this process. This is the same serotonin that rattles around in your brain, affecting your mood, and are the primary target of most antidepressant medications. Huh. The human body’s kinda weird like that… Anyway, enjoy!

Thanks for reading! Wash your hands!

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