Khan Academy Static

No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound “Lub Dub.”

10722_Circulatory_system_and_the_heart.html

10721_Arteries_arterioles_venules_and_veins.html

10716_Two_circulations_in_the_body.html

10719_Thermoregulation_in_the_circulatory_system.html

10715_Flow_through_the_heart.html

10718_Layers_of_the_heart.html

10714_Meet_the_heart_.html

10720_Arteries_vs_veins_what_s_the_difference_.html

10717_Lub_dub.html