I readily admit I have no official training at all in anything related to medicine. I admit I had to look up "portal vein" and opted to watch a YouTube video about the hypothalamus to better understand why it is such a big deal. I appreciated Matt's concise and easy-to-follow overview of our body organs and systems and continue to be amazed at just how amazing our bodies are! Be sure to read all the way to the end of the chapter as Matt pulls it together and also presents his rational for small, material doses, also referred to as "Wood Doses", thanks to Matt's last name. (It's a good thing he has such a nice last name. "Raadt doses" just wouldn't have such a nice ring).