Nowdays, reaction time is most often used in data processing as a quantitative method and technique for information step and speed processing. The aim of this investigation was to examine everyday work pressure on reaction time nd among students. An examination included 30 students of 2 year of Medicine Faculty 15 males and 15 females. Audible and visual simple reaction time as well as choice reaction time for 2, 4 and 6 stimuli was used for reaction time measurement. Measurements were done three times a day. Achieved results acknowledge statistically significant improvement of reaction time at noon compared to reaction time in the morning in all samples except for visual simple reaction time for male students. For all kinds of stimuli, reaction time were significantly prolonged in the evening in both groups. Therefore, we have concluded that morning activities had positive impact on students functional condition but afternoon activities acted like an additional stress that altered students latent fatigue to clearly observable acute fatigue.

Breast cancer remains one of the most common malignancies in women and is one of the leading causes of cancerrelated mortality. Despite the current emphasis on breast conservation, mastectomy rates remain at 30%. Mastectomy is often associated with significant psychological sequelae including distorted body image and sexual dysfunction. Breast restoration is assumed to allow a full emotional and physical recovery from a breast cancer crisis. Autogenous tissue gives the best results, and currently the best technique in most women is probably the free DIEPflap. there is theoretically minimal functional loss, minimal risk of hernia, less postoperative pain, and shorter hospitalization. However, there is a range of options, such as other flaps and use of implants, which can be tailored to specific situations

The surface area of the small intestine is enhanced by three morphologic features that are peculiar to the gut: plicae circulares, the villi and the microvilli. The plicae circulares (circular folds) consist of mucosal/submucosal invaginations that are predominantly located in the duodenum and jejunum. These infoldings are visible on gross inspection. The intestinal villi, finger-like projections that protrude into the intestinal lumen, are approximately 0,5-1,5 mm long and cover the mucosal surface. They can be viewed by close inspection of the mucosa under low-power microscopy. Their microscopic appearance varies: duodenal villi are characteristically broad and leaf-shaped, jejunal villi are tall and thin, and ileal villi are short and broad. The length and shape of the villi also vary with geographic region. At the base of the villi, the epithelium enters the lamina propria and forms the crypts of Lieberkühn, which extend almost to the muscularis mucosae. The microvilli are sub-light microscopic tubular projections that are extensions of the apical cell membrane and compose the brush border. There are the enzymes and receptors in these structures which are required for terminal digestion and absorption

The research was conducted at the Department of Pathology and Histology of Clinical center of Novi Sad. We analysed the reports of autopsies of newborns (to 28 days old), stillborns and miscarried fetuses in 1991 and 2001. Found
malformations were classified according to organ systems. Results for 1991 show next structure of congenital malformations: 3 malformations of central nervous system (14.29%), 0 malformations of urogenital system (0%), 3 malformations of
gastrointestinal system (14.29%), 1 malformations of musculosceletal system (4.76%), 9 malformations of cardiovascular
system (42.86%), 1 chromosomal defects (4.76%), 4 multiple malformations (19.05%). Results for 2001 have next value: 9
malformations of central nervous system (27.27%), 4 malformations of urogenital system (12.12%), 5 malformations of
gastrointestinal system (15.15%), 0 malformations of musculosceletal system (0%), 4 malformations of cardiovascular
system (12.12%), 2 chromosomal defects (6.06%), 9 multiple malformations (27.27%). By the comperison of the results of
structure of congenital malformations in 1991 and 2001, we can conclude that the differences of cardiovascular and urogenital malformations are statistically important