I enjoyed your coloring, and all the details in the picture. It seems to me likea much darker and gorey science human body study book, in wich things are way more graphic, and sometimes disturbing. When you said that Carothid Sheath is called Vagina carotica in german, I could understand it, because Carotid sheath looks like one.
Anyways, Good job @SinnyKit! I liked it a lot!