Twenty newborn wistar rats and thirty roman chickens were chosen to study the effect of cold acclimation on histiocytological changes of adrened or pituitary and the levels of Triiodothyronine (T3), thyroxine (T4), Insulin.

• 以20只健康Wistar大鼠仔鼠和30只罗曼雏鸡为试验对象，研究冷适应对大鼠仔鼠和雏鸡某些内分泌腺和激素水平的影响。