It's the heaviest organ in the human body, but exactly what role does the liver play in sustaining life? Follow along with this short video as it explores the various ways the liver filters, stores, and manufactures materials...

A model of a torso in a high school classroom is displayed while the teacher points out various arteries going from the heart to the GI tract and down to the legs. She then looks at the veins coming back up and some superficial vessels....

The functions of the various blood vessels are explicated quickly in this one-minute animated video. Quiz your young biologists on anatomy and show them this video after they have attempted to answer what the functions of the three types...

Find out how to use the PV loop to draw the Ea (Arterial Elastance) line, and what it represents. Rishi is a pediatric infectious disease physician and works at Khan Academy. [11:21]

Your heart gets a lot of attention from poets, songwriters, and storytellers, but today we'll learn how it really works. The heart's ventricles, atria, and valves create a pump that maintains both high and low pressure to circulate blood...

This short movie gives you a fun way to learn the basics of the heart and how the circulatory system works. From KidsHealth.

Your heart gets a lot of attention from poets, songwriters, and storytellers, but today Hank's gonna tell you how it really works. The heart's ventricles, atria, and valves create a pump that maintains both high and low pressure to...

In this video lecture, learn about compliance (and elastance) of arteries, veins, and lead pipes! [9:55]

Learn the differences between these blood vessels! Rishi is a pediatric infectious disease physician and works at Khan Academy. [7:43]

Learn how compliant arteries allows for a "Constant Pressure System" like a modern water gun! [6:04]

See how arteries behave like sling shots, shooting blood (not rocks) onwards! [6:21]

Find out how compliance allows arteries to store elastic energy (and lower pressure). [9:54]

Remember the three key layers of a blood vessel (Tunica intima, Tunica media, and Tunica externa) and how arteries, veins, and capillaries are all different from one another. Rishi is a pediatric infectious disease physician and works at...

This lesson will identify the main structures and function of the cardiovascular system as one of the 11 organ systems of the human body. It is 1 of 2 in the series titled "Cardiovascular System."

Learn the difference between Arteriosclerosis, Arteriolosclerosis, and Atherosclerosis. [9:17]

See how hyperplastic arteriolosclerosis (Protein in the arterial wall) makes it difficult for blood to go through blood vessels. Rishi is a pediatric infectious disease physician and works at Khan Academy. [5:10]

See how hyaline arteriolosclerosis (Protein in the arterial wall) causes hardening of the blood vessels. [11:13]

See how arteries behave like slingshots, shooting blood (not rocks) onwards! Rishi is a pediatric infectious disease physician and works at Khan Academy. [6:20]

This video lesson from Khan Academy provides information about strokes. Students will learn basic information about the causes of strokes and how to prevent strokes.

Sal Khan clarifies the difference between a thrombus and an embolus (and between thrombosis and embolism) in this video. [5:03]

Temporal arteritis (otherwise known as giant-cell arteritis) is a type of vasculitis that affects medium to large arteries in the head. Patients with temporal arteritis can have symptoms like migraines and sudden vision problems. Learn...

This lesson will classify the various types of blood vessels depending on their structure and function. It is 1 of 3 in the series titled "Blood Vessels."