title: The effect of acclimatization on blood flow and its distribution in normothermic and hyperthermic domestic fowl.
abstract: Blood flow and its distribution was examined in summer and winter acclimatized normothermic and hyperthermic domestic hens. A clear trend of season on normothermic blood flow distribution was not noted; however, a significant tendency towards increased flow in summer was recorded. In 22 out of 28 organs or tissues examined, blood flow was lower in winter than in summer: pectoral muscle, adrenal and jejunum winter to summer ratios were 36, 64 and 76%, respectively (P less than 0.05). During hyperthermia, blood flow to visceral organ decreased in both groups; in summer this reduction was less severe in parts of the digestive system and more pronounced in parts of the reproductive system.
mesh_terms: D000064:Acclimatization; D000818:Animals; D001794:Blood Pressure; D001831:Body Temperature; D001833:Body Temperature Regulation; D002645:Chickens / Q000502:physiology*; D005260:Female; D006339:Heart Rate; D006358:Hot Temperature; D010101:Oxygen Consumption; D012039:Regional Blood Flow; D012119:Respiration; D012621:Seasons; D014870:Water Loss, Insensible