CK-12 Foundation
Ck 12: Life Science: Heart
[Free Registration/Login may be required to access all resource tools.] What does the heart look like? How does it pump blood? Learn more about the heart in this learning module produced by CK-12.
Bill Nye
Bill Nye: Listen to This!
You may have heard people say that your heart is a pump. You can tell a lot about how well your heart is working, just by listening with a stethoscope.