PBS
Pbs Learning Media: Map of the Human Heart
See how the human heart moves blood through the body in this animated feature from the NOVA: "Cut to the Heart" Web site.
Science Buddies
Science Buddies: Can Your Body Temperature Tell the Time of Day?
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....
Science Buddies
Science Buddies: Heart Rate Recovery Times
After exercise, your heart rate increases, this is normal for everyone. However this experiment asks whether the recovery time for a heart's beating rate is faster for people who get regular exercise versus those that do not.
Science Buddies
Science Buddies: A Day in the Life of Your Heart
Heart rates can be determined by the amount of physical activity your body is engaging in. The more physically active you are, the faster your heart beats. You can measure the rate your heart is beating by taking your pulse. This science...
National Cancer Institute at the National Institutes of Health
Seer Training Modules: Introduction to the Cardiovascular System
Self-guided learning activity where students learn about the structure and function of the human cardiovascular system. There is a short quiz at the end of the lesson to check for understanding.
PBS
Pbs Learning Media: Amazing Heart Facts
This feature from the NOVA: "Cut to the Heart" highlights facts about the heart, including its size and placement, and will help you to understand the importance of this wondrous organ in our bodies.
Science Buddies
Science Buddies: Effects of Exercise: Changes in Carbon Dioxide Output
Everybody knows that your body needs oxygen to keep going, and that you breathe out carbon dioxide as waste. What happens when you exercise? You've probably noticed that you breathe faster, and your heart beats faster. What triggers your...
Other
Dr. Saul: Biology in Motion
This interactive site provides animations and activities in several areas of physiology. The images are simple, but clear. The accompanying text provides a good description of the process being shown.