Chapter Three - Dissection and Taboo

CHAPTER THREE

Dissection and Taboo

SO, YOU WANNA learn about the human body?

Cool.
Step one: find a dead guy.
Step two: cut him open.

Yeah… good luck with that.

For most of history, opening up a body wasn’t “science.”
It was sacrilege, witchcraft, or straight-up criminal activity.

In other words: you better be really fast, really sneaky, or really holy.

Because anatomy didn’t begin in a lab. It began in the shadows.

If you lived in ancient Greece or medieval Europe, the body was off-limits, especially after death.

Corpses were for funerals, not exploration.
The Church called it desecration. The state called it a felony. Society just called it gross.

So for a long time, doctors weren’t dissecting the body, they were guessing.

Sometimes they copied ancient texts. Sometimes they just assumed.
(“That pain in your chest? Definitely your black bile acting up.”)

If you were lucky, you might get your hands on an old battlefield corpse. Or a criminal freshly executed. But it was rare. And dangerous.

Because dissection wasn’t just illegal. It was blasphemy.

And in some places, it could get you burned at the stake.

Enter Galen, the Roman Empire’s #1 doctor.

Galen was a genius. He gave lectures, wrote books, and basically defined medical knowledge for the next 1300 years.

One problem: he wasn’t allowed to dissect humans.
So what did he do?

He dissected monkeys and pigs and then just guessed we were the same.

To be fair, he got a lot right. But he also made some calls that aged like spoiled milk.
He thought the liver made blood. He thought arteries carried air. He thought the brain was just a cooling fan.

Still, no one questioned him. For over a millennium, “What did Galen say?” was the final answer.

Nobody was cracking open corpses to check. That would be illegal.

Until it wasn’t.

Let’s rewind even earlier, to Alexandria, around 300 BCE.

In this rare moment of openness, two guys, Herophilos and Erasistratus, got permission to dissect human bodies. Real ones.

Some say they even vivisected criminals, cutting people open while they were still alive.
(Yeah. That part's a little horrifying.)

But they discovered things that nobody else had.
The nervous system.
The brain as the control center.
The difference between veins and arteries.

Then… whoosh, gone. The window closed. Their work was buried.
The taboo came crashing back.

And it would take a very long time before the blade came out again.

Fast forward to the 1500s.

The Renaissance is popping off. Artists are drawing real bodies. Science is heating up. And one Belgian badass named Andreas Vesalius says:
“Enough guessing. Let’s cut.”

He steals corpses from gallows and graveyards.
He dissects them live on stage.
He maps the entire human body, bones, muscles, and organs, piece by piece.
And in 1543, he drops the mic:
De humani corporis fabrica, “On the Fabric of the Human Body.”

It’s a masterpiece. And it blows Galen out of the water.

For the first time in centuries, people saw what was really inside them.

And it was... surprisingly gross, but also super interesting.

Even after Vesalius, the supply of bodies was a problem.

You couldn’t exactly post a “Cadavers Needed” ad.

So came the body snatchers, people who dug up fresh graves and sold corpses to medical schools under the table.

In 1800s Britain, there was even a black market for bodies.
Some guys (cough Burke and Hare cough) skipped the digging part and just started murdering people to meet the demand.

Yeah, “medical progress” had a bit of a sketchy origin story.

But it worked.

By the 19th century, dissection became part of medical training.
It wasn’t illegal anymore, it was required.

The blade had finally come out of the shadows.

And for the first time, we weren’t just thinking about the body…

We were inside it.