The Heart
•Your
heart is about the same size as your fist. An adult’s
heart is about two fists.
•An average adult body contains about five quarts of
blood.
•All the blood vessels in the body joined end to end
would stretch 62,000 miles or two and a half times
around the earth.
•The heart circulates the body's blood supply about 1,000
times each day.
•The heart pumps the equivalent of 5,000 to 6,000 quarts
of blood each day.

http://www.kscience.co.uk/animations/hea
rt.swf
Blood flow in the Heart
Blood from the body flows:
 Deoxygenated blood enters the heart
through the superior and inferior vena
cava,
 then flows into the right atrium
 Goes through the tricuspid valve
 to the right ventricle
 Gets pumped through the pulmonary valve
 to the pulmonary artery
 to the lungs
The blood picks up oxygen in the lungs,
and then flows from the lungs:
 Through the pulmonary veins
 Into the left atrium
 Flows through the mitral valve
 Into the left ventricle
 Flows through the aortic valve
 Into the aorta and pumped to the body

Fill in worksheet during the next two
videos/ websites
 http://www.smm.org/heart/heart/inout.htm interactive model
 http://www.makingsenseofhealth.org.uk/gf
x/library/resources/HA2_VC.wmv
disection

Webquest- let’s go to the computer room