I have taken quite a few practice MCAT's and I still have not seen 1 passage on embryology or fetal development/respiration/circulation. I have seen passages regarding hormones and how they would effect development but not on the blastula gastrula morula etc. Is this tested heavily on the MCAT? I have not seen much of it( I have taken 6 exams) but I do not want to be the person who shows up on test day with questions regarding embryology and I am SOL. What shoul I know as I feel Kaplan goes in depth to the extreme when it comes to chapter 5 Embryology in thier book.