From prior reading, I thought that Dorsal is the same as Posterior and Ventral is the same as Anterior. However, when i checked in google images for these anatomical terms for a horse (just to strengthen my concept), i found that Dorsal is not the same as Posterior and Ventral is not the same as Anterior. 

How is this possible? I have checked many websites but all state that Dorsal is the same as Posterior and Ventral is the same as Anterior. Am i going wrong somewhere?

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/6pH07.jpg