This video lesson from Khan Academy provides information about hypertension, a circulatory system disease. Students will learn about the effects on the heart.

This video lesson from Khan Academy provides information about hypertension, a type of circulatory system disease. Students will learn about hypertension's effects on the blood vessels.

This resource from Khan Academy provides information about hypertension, a circulatory system disease. Students will learn the symptoms and categories of hypertension.

This video lesson from Khan Academy provides information about hypertension, a type of circulatory system disease. Students will learn the symptoms and categories of hypertension.

An aortic dissection is a life-threatening condition where there is a separation of the layers in the wall of the aorta. This video describes the aorta and what causes a dissection. [13:38]

This lesson will identify what blood pressure is and factors that affect blood pressure. It is 1 of 5 in the series titled "Blood Pressure."