Because it tells you which creatures can be house-trained (because the sphincter is formed from the cell sheet that will develop voluntary-muscle innervation) and which ones can’t?
Failing anatomy got me thrown out of medical school. It wasn’t the actual anatomy that got me, it was the rote memorisation of names that made no systematic sense.
Absolutely agreed, Roger. Rote learning of non-sensical names, almost all of which are of academic importance only even to specialist surgeons. Yes you’d rather your orthopod didn’t sever your sciatic nerve during hip surgery, but it’s pretty easy to spot, and for a general practitioner these things are of extremely limited use. It’s learning for the sake of learning.