Trace the flow of blood from the time it enters the right atrium until it is pumped into systemic circulation. Include in your answer chambers of the heart, heart valves and blood vessels.
Since this is not my area of expertise, I searched Google under the key words "blood flow heart" to get these possible sources:
http://www.guidant.com/condition/heart/heart_bloodflow.shtml
http://www.guidant.com/condition/heart/
http://www.heartpoint.com/theheart.html
http://www.clevelandclinic.org/heartcenter/pub/guide/heartworks/bloodflow.htm
http://www.sjm.com/resources/learnmoreabout.aspx?section=HeartAndBloodFlow
In the future, you can use a similar process to get the information you want more quickly,
I hope this helps. Thanks for asking.