author(s)
Ali S Al-Hassani

abstract
In the present study, histological study was carried out on adult chickens to focus the light on the effects of GH and IGF-1 on heart, liver and gizzard. The microscopic examination had shown that GH and IGF-1 promotes protein synthesis in the heart tissue. The herein work referred to the presence of a considerable amount of adipose tissue among the bundles of cardiac muscles which is related to the metabolic process. The results also revealed that GH and IGF-1 promotes both protein synthesis and Mitosis in the tissues of liver and gizzard. Moreover, the above hormones stimulate apoptosis, regeneration, and secretory activity in gizzard secretory glands.