@ my place, the syllabus for 1st year Med and Dent are almost the same.. both will learn the 3 basic sciences : Physio , Biochemistry, and Anat..
but as for dentistry, they will be focusing more (i mean it) onto Thorax + Head and Neck region in Anatomy.. and they wont study about Lower limb + GIT system
for physiology they will also learn all of the stuffs except GIT system..
in addition, the dentistry students also learn another extra subject called Oral Biology (im not sure what this do, couldnt recall)

anatomy is fine, at first u'll be scare shit when there are tons of things to remember.. but later you'll find that it is nothing compare to other subjects like.. pharmacology ( damn i hate this subject    )