The effect of acclimatization on blood flow and its distribution in normothermic and hyperthermic domestic fowl.
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.
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