ABSTRACT
This work deals with the use of ultrasound waves of frequency 20 KHz and average intensity 1.5 W/Cm[2], to study its effect on the cellular ultrastructure and the concentration of the zinc and iron on the rat skin. This study was conducted on 20 rats. They were divided into four groups: control, and three experimental groups exposed to ultrasound radiation for 15, 20 and 30 minutes respectively. Skin samples were taken to study thefr ultrastructure by a transmission electron microscope and their zinc and iron content by an atomic absorption spectrophotometry. There were evident on ultrastructural changes in rat skin, exposed to ultrasound at different intervals when compared with the normal tissue. As regard to the trace elements there was a significant decrease in concentration of Zn and increase in Fe concentration in comparison with the control group