How Does Anesthesia Work? is a TED-Ed lesson that provides a five minute overview of the history of anesthesia and painkillers used during surgeries. The second half of the video explains the basics of the physiology of how anesthesia works. The lesson is appropriate for high school students taking an anatomy and physiology course.
Meet Your Tonsils! is a SciShow Kids lesson that explains what tonsils are, what they do, and how a doctor checks them. It's a lesson that is appropriate for elementary school students.