Ba-dum, ba-dum! The gentle beating of our hearts is the drum beat of our lives. But how does all that blood pump through our body so efficiently with just a few beats? Learn about the circulatory system with a collection of videos, presentations, lessons, and activities aimed at middle schoolers.

The ankle bone's connected to the leg bone. The leg bone's connected to the knee bone. The knee bone's connected to the...  Bones play a very important role in the function of our bodies. They protect our organs and provide support for our bodies. Use this collection of lessons, videos, and worksheets to deliver instruction and practice to upper elementary and middle school students.

What happens to the human skeleton when it has been in space for an extended time? What does a reduced-gravity environment do to our bodies? Can we learn about our own skeletons by taking apart a chicken carcass? Explore the concepts of space and human physiology through a series of labs, lessons, and research in these 10 resources. Pick and choose or do all of them!