The present investigation is concerned with the effect of mobile phone radiation on the development of mice embryos. The pregnant females were divided into 3 groups, the control group (GI) and 2 irradiated groups, 10 females each. The 2 nd group and 3 rd group were subjected to 950MHz at SAR=1W/kg and 1800MHz at SAR=1.6W/kg respectively from day 7 to day 14 of gestation for 2 hours/ day. The exposure to microwave caused fetal growth retardation in all irradiated groups. However, no morphological abnormalities were observed in all the experimental groups.The retina of the 18-days-old fetus maternally exposed to microwave showed histopathological changes including pyknotic nuclei in both outer and inner nuclear layers (group II), while they lost their normal arrangement and became aggregated in the outer nuclear layer in group III. At ISSN 2157-6076 2013 www.macrothink.org/jbls 216 the level of electron microscopy the retinal tissue revealed deformed and dilated mitochondria and condensed heterochromatin of the nuclei of the outer nuclear layer. The ganglionic cells showed degenerated cytoplasmic organelles in group II. However, remarkable aggregations of melanin pigments were detected in the pigmented layer of group III. Since the evaluation of the clinical relevance of microwave radiation interactions on fetal retina is still lacking, such pathological changes must be taken into consideration in order to minimize cell injuries. Journal of Biology and Life Science

he present investigation aims to illustrate the morphological, histological and ultrastructural differences in the intestine of a carnivorous fish, Schilbe mystus and a herbivorous fish, Labeo niloticus, in correlation with their feeding habits. The histological examination of the mucosa of the intestine of both studied species revealed that it is built up of a simple columnar epithelium that contains goblet cells. Though these, are generally more numerous in the intestine of Schilbe mystus than in that of Labeo niloticus. The ultrastructural investigation of the mucosa of the duodenum and ileum of Schilbe mystus revealed that the enterocytes are tall columnar cells and possess well-developed microvilli, numerous mitochondria, microtubules and numerous lipid droplets. The ultrastructural examination of the mucosa of the ileum of Labeo niloticus revealed that the enterocytes are tall columnar and possess well-developed microvilli, numerous mitochondria, microtubules, a few endocytotic channels and aggregated chylomicrons. The enterocytes of the rectum of both studied species are tall columnar and are characterized by the presence of short and wellspaced microvilli, a well-developed vesiculotubular system, numerous microtubules and mitochondria. In addition, the rectal enterocytes of Schilbe mystus contain endocytotic vesicles. The intestinal muscularis of both studied species is well-developed and built up of unstriated muscle fibres, which are arranged into two layers: an inner circular layer and an outer longitudinal one. The rectal muscularis of both studied species is thicker than that of the rest of the intestine.

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