Comparative study of the cardiovascular system.
D000349:Africa; D000818:Animals; D002309:Cardiology / Q000266:history*; D002320:Cardiovascular Physiological Phenomena; D005060:Europe; D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D010828:Physiology, Comparative / Q000266:history*