On the motion of blood in the veins.
D000818:Animals; D016275:Atrial Function; D001775:Blood Circulation; D005060:Europe; D006321:Heart / Q000502:physiology; D006329:Heart Conduction System / Q000502:physiology; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008168:Lung / Q000502:physiology; D010827:Physiology / Q000266:history*; D012119:Respiration; D014680:Veins / Q000502:physiology*; D016276:Ventricular Function