TAILIEUCHUNG - The Reproductive System

It is common practice to recommend nutritional supplementation, such as multi-vitamins and iron, following bariatric surgery for all patients. However, evidence is scarce regarding specific recommendations for pregnant women. We did not identify any randomized studies assessing this question of efficacy of management strategies. Studies evaluating pregnancy following laparoscopic adjustable gastric banding or gastric bypass have shown minimal nutritional adverse events; however, most of these studies monitored and ensured that the women complied with vitamin supplementation. Some case reports/case series stated that the patients who had nutritional deficiencies did not take the recommended supplements. Regarding laparoscopic adjustable. | Real Media File for Male Reproductive System The Reproductive System Sexual Reproduction Fertilization requires haploid gametes Nov 18 2006 Figure an imnrlnt of Addison Westev Lonaman Inc Mitosis and development Diploid zygote 2n 46 Multicellular diploid adults 2n 46 Cellular Reproduction Growth and development of all somatic cells The simplest form of reproduction is cellular reproduction. Single celled organisms can use mitosis to reproduce the entire organism and increase the specie s numbers but multicellular organisms including man use mitotic cell division to grow repair and replace somatic cells and tissues in the body. Mitosis is employed from the first division of the fertilized egg zygote to the development and maturation of all somatic cells and tissues. The cells it produces are all genetically identical but they differentiate to become varied in structure and function and employ only the genes necessary for those specific structures and functions. If organisms only reproduced by mitosis . asexually they would all be genetically identical and vulnerable to any disease that came along to which the population was not resistant. Sexual reproduction has evolved to provide genetic variability within the population. Even single celled organisms employ sex to maintain their genetic variability. And for complex organisms such as humans sexual reproduction is the only form future cloning notwithstanding Sexual reproduction employs not a splitting of cells as in mitosis but a union of cells from two different organisms usually in a process called fertilization. In order for this to occur gametes sex cells . sperm and eggs must be produced which have half the chromosome number as the somatic cells so that when fertilization brings two such cells together the normal chromosome number is produced in the zygote fertilized egg . We call this number haploid and the number of chromosomes in the somatic cells diploid. 1 Cellular Reproduction Mitosis - exact .

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