American Heart Association
American Heart Association: Low Blood Pressure
Presents low blood pressure as a common side effect of pregnancy, some medications, and other circumstances, but as an indication of a potential problem if associated with a provided list of warning signs and symptoms.
American Heart Association
American Heart Association: Conditions: High Blood Pressure or Hypertension
Find out why high blood pressure is dangerous to your heart and overall health. Learn why and how high blood pressure damages the heart and who is at risk for high blood pressure. Information on treatment and prevention includes a link...
BioEd Online
Bio Ed Online: Heart: Basic Measurements
In this lesson plan students are introduced to heart-related data, such as blood pressure and oxygen saturation. They will also learn basic information about the heart and circulatory system.
TED Talks
Ted: Ted Ed: How the Heart Actually Pumps Blood
For most of history, scientists weren't quite sure why our hearts were beating or even what purpose they served. Eventually, we realized that these thumping organs serve the vital task of pumping clean blood throughout the body. But how?...
OpenStax
Open Stax: Anatomy & Physiology: Cardiac Cycle
Students learn the structure and function of the cardiac muscle and study the components of the conducting system that distributes electrical impulses through the heart during the cardiac cycle.
BioEd Online
Bio Ed Online: Microgravity
In this lesson middle schoolers will use water balloons to simulate the effects of gravity and microgravity on fluid distribution in the body.
Other
Cardiovascular Disease: Facts, Prevention, Treatment
This site discusses lifestyle changes, nutrients, and medical options and precautions.
Khan Academy
Khan Academy: What Is Hypertension?
This resource from Khan Academy provides information about hypertension, a circulatory system disease. Students will learn the basic facts about this disease.
Other
Adrenal Gland Disorders
The body has two adrenal glands, one near the top of each kidney. The inner part (medulla) of the adrenal glands secretes hormones such as adrenaline (epinephrine) that affect blood pressure, heart rate, sweating, and other activities...