Anatomy and Alchemy (Tech Tree)

Half of this technology tree deals with autopsies and the kind of organs you can get. It's unlocked by the tutorial.

The other half, the alchemy part is unlocked upon talking to the old woman in the swamp.

A very small part deals with zombies and is unlocked by talking to Gunter.

As you unlock more items along this tree you'll gain access to better autopsy techniques and resources, as well as more alchemical apparatuses and products.

Anatomy
This branch is unlocked through the tutorial by speaking to Gerry. For more information on the anatomical operations see Morgue.

Alchemy
This branch is unlocked after accepting the quest to restore Clotho's memory. For more information on the various processes see alchemy.