NGSS requires that students learn about body parts and their functions, learning about external parts in 2nd grade and both internal and external structures on a macroscale in 5th grade.(LS1A) furthermore, under LS4A, Evidence for evolution, students need to understand that comparative anatomy is one of the evidences. this worksheet shows various vertebrates in order of supposed evolution and shows their digestive and skeletal systems for comparison. 5th and 6th graders should be able to master this worksheet with possibly some help from the teacher. Questions with answers are included.