Fetal Pig vs. Rat

[Nabz23]

So we just completed dissections last week and we are gonna have a quiz on it tmrw, one of the questions our teacher has told us as a freebie is one that is quite not so obvious for us in our class. "What does the fetal pig have that the rat doesn't ? " < That is the question , if i take a guess from the dissection it seemed as the gall bladder because I dissected the rat and never sited it meanwhile the group beside me were doing a pig and the had a gall bladder.

(I'm in grade 11 bio so don't use some like extreme terms lol)

Thanks to who would give the correct answer!

[JackBean]

Little late, but what about (embryonal) stem cells? They are quite IN nowadays