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.
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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...