It is just my curiosity. I wanted to see a dissection of a long bone to see how the yellow bone marrow looks like. I looked at the video showing a blood sample under the microscope to see red, white cells and platelets. I looked at bones and muscles in 3D, googled the ear bones pictures.
Can you look at the class note of the digestive system. There ar the list of organs/structures of the digestive system. Those are the organs you need to write about.