The Vertebrate Circulatorium

In the Veterbrate Circulatorium you can compare the circulation patterns of different vertebrates. Click on the different animal names on the left to see the overall circulation patterns in "systemic view." More detailed views of the hearts are available by clicking on "To heart detail".

Electrocardiogram Primer

A quick tutorial on the basics of the electrocardiogram machine. Created by one of HHMI's high school interns from Thomas Edison High School of Technology in Montgomery County, Maryland.

Heart Size in Mammals

Explore the relationship between heart size and rate in this multimedia demonstration by one of HHMI's high school interns Thomas Edison High School of Technology in Montgomery County, Maryland.