Mammalian   cardiovascular
   system.
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   Pulmonary (lung) circuit:
<Li> The right ventricle pumps blood to the lungs
<Li> via the pulmonary arteries.
<Li> Blood in capillaries loads O[2] and unloads CO[2].
<Li> Oxygenated blood returns via pulmonary veins
<Li> to the left atrium and left ventricle.
<P>
   Systemic circuit:
<Li> Oxygenated blood leaves the heart via the aorta
<Li> to capillaries in the head and arms, and also
<Li> to capillaries in the abdominal organs and legs.
<Li> Oxygen-poor blood returns via superior vena cava
   10. and inferior vena cava, then empty
   11. into the right atrium.
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   Review:  <A ClAsS=ACT Href="http://media.pearsoncmg.com/bc/bc_campbell_biology_7/media/activities/load.html?42&amp;B" oNClick="popact('http://media.pearsoncmg.com/bc/bc_campbell_biology_7/media/activities/load.html?42&amp;B');txtcolor('mammalian_circulation1','gray');return false;" Id=mammalian_circulation1><iMg sRc="/images/tutorial.gif" aLt='' boRDer=0></A>
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