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.

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...

The circulatory system and how it functions are explained. An interactive diagram shows how blood flows through the heart. Disorders of the heart and the circulatory system are also described.

Overview of the cardiovascular system with labeled diagrams and reviews of the heart, torso, arm, leg, and blood, available through the links on the right.

One-page article with a complete overview of the importance of good nutrition in reducing your risk for health problems, including facts on nutrients, vitamins, body mass, snacking tips, and ChooseMyPlate.

This site discusses congestive heart failure, different medicines used to treat it, and surgical procedures which may be necessary.

Labeled diagram of the heart valves shows how blood flows through the heart with useful information on causes, symptoms. diagnosis, and treatment of valve disease when this blood flow is disrupted.

One-page overview of pacemakers includes detailed labeled diagrams of the heart and implantable pacemaker along with essential information on how to live with one.

One-page article answers key questions about heart attacks: causes, symptoms, diagnosis, and treatment.

One-page overview containing a detailed labeled diagram of the anatomy of the heart including the valves, conduction system, and circulatory system.

Read a general overview of heart attacks and heart pain, including angina. Content includes information on the difference between stable and unstable angina, and the symptoms of a heart attack.

This resource presents brief information defining a heart attack. The article also contains many links to related topics and publications in English and Spanish.

Teenagers often dedicate themselves emotionally to a relationship to a great degree and coping with loss can be quite difficult. This site provides insight for teens on how to manage these feelings and move towards the future. Links to...

From MedlinePlus, a video tutorial featuring information on heart bypass surgery with accompanying text.

Learn about all aspects of obesity and being overweight! Click on the main topics along the menu bar to access detailed facts ..including causes, risks, who is at risk, symptoms, diagnosis, treatment, prevention. Links to related sites...

In this lesson plan site, the students will learn about the circulatory system and perform an experiment where they take their pulse after various activities.

One-page overview on heart transplants with useful information on the reasons for needing one and the process one goes through to get one.

One-page article describes the pumping action of the heart.

One-page article answers questions about heart murmurs: causes, symptoms, diagnosis, and treatment.

Answers questions about blood: what it is, its function, and types.

One-page article with a complete overview of peripheral vascular disease (PVD) and all the different conditions this disease may lead to, including diagrams, causes, risk factors, symptoms, diagnosis, and treatment.

The one-page article answers questions about aneurysms and dissections: causes, symptoms, risk factors, and treatment.

One-page article with a complete overview of coronary artery disease (CAD), including diagrams, causes, risk factors, symptoms, diagnosis, and treatment.

One-page article with useful information on carotid artery disease, including diagrams, causes, risk factors, symptoms, diagnosis, and treatment.