Reproductive system in an organism is for the purpose of sexual reproduction. It is a system of sex organs within its body which is also called as genital system. Not only the sex organs but also the various non-living substances within the body such as hormones, pheromones, body fluids, etc form an important accessory to the reproductive system that works together for the purpose of sexual reproduction. The sexes of differentiated species often have significant differences in their respective genital systems. These differences allow for combination of genetic material between the two individuals, which in turn favors possibilities of greater genetic fitness of the offspring. Humans have a high level of sexual differentiation among male and female reproductive systems. In addition to the differences in their sex organs numerous differences typically occur in their secondary sexual characters. The human reproductive system involves internal fertilization. The production of gametes for the purpose of fertilization takes place within the gonads through the process known as gametogenesis. Specifically, it is termed as spermatogenesis in males while oogenesis in females. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on May, 2014