This is an excellent model of the human muscle and bone structure, freely shared by Raf Grassetti (https://grassettiart.gumroad.com/l/KbAQA). It is around 12cm tall. If you want to print a bigger version, i recommend taking a look at the 25cm version here: https://www.printables.com/de/model/984738-ecorche-easy-assembly-human-anatomy-25-cm-tall
Optimised for FDM, the body parts need to be glued together. This is where the "sticks" come in, they fit into the holes provided and make aligning and gluing the parts much easier. There are 5 sticks on the plate, but you only need 4. The reason for the extra ones is that they are very easy to lose.
Before you start gluing your model together, check that the "sticks" fit into their holes, as the tolerances are quite tight. If they do not fit, print out plate 3 ("sticks (loose)") and try again.
The first step in assembly is to apply glue to the "stick" holes and to the surface of one of the parts. The next step is to insert the "sticks" and put glue on them. Finally, press the two parts together and hold for ~15 seconds or as long as your glue requires. The "sticks" will be strong enough to hold the parts together afterwards.
The Ecorche in the pictures is printed with PolyTerra PLA Matte White and the base is printed with Jayo PLA Black. I recommend using a matte filament to make all the intricate details more visible, although it will also make the seam between the parts more apparent.
The author remixed this model.