If you have ever had to adjust to a new time zone, you have noticed that it takes a while before you start to feel normal again. By shifting your sleep and activity schedule, you have altered the pattern of your body's circadian rhythms....

The innovative resource investigates endothermy and ectothermy. Students compare body temperature of a snake and rat before and after exposure under a heat lamp. The activity has an interactive online version and a printable data sheet.

This instructional activity highlights the similarities between human sensors and their engineering counterparts. Taking this approach enables students to view the human body as a system, that is, from the perspective of an engineer....