Inside nature's giants is a UK documentary series, this is the episode on elephants.
See the enormous digestive system, so similar to horses, the fascinating teeth structure, the large digital cushion and the unique attachment of the lungs.
⚠ This video contains footage of an elephant dissection !
The same team has also done the racehorse.
More detailed dissection opportunities
For horse professionals there are many teams running dissections of horses, I follow Zefanja Vermeulen of Equine Studies and Thirza Hendricks who are supported by Sharon May-Davis. So much to learn.