Given all else that you have to learn about science, I think it would be better to focus on a few topics instead of treating several topics superficially. I think this is a good choice because we can more closely examine how science works through all the activity going on in medical science. In addition, I think the area of human biology has many opportunities for you to learn about being scientists by conducting your own experiments. Finally, how your own body works should be relevant, if not interesting, to you. You will be asked to master content at the level of detail it is presented.
Mastery involves more than memorization.
It requires understanding, which means that you can make logical connections between different pieces of information, and that you can apply what you know to new situations. To provide instruction on the nature and methods of science, and the connection of science to other disciplines. To provide instruction on selected areas of human biology. Constructing and conducting experiments. Interpreting data and drawing conclusions.