REPRODUCTIVE SYSTEM ::
The continuity of the species is maintained by reproduction that is production of further new members of the same species Human being is the highest evolved organism The mode of reproduction is sexual sex is the character that divides the world into two group male and female The sexual characters may be primary or secondary Primary sex characters are those which are responsible for the development of secondary sex characters They are testes in the male and ovaries in the female Genital organs such as testes scrotum vas -deferens seminal vesicles prostate gland penis (in male ) and vagina uterus fallopian tubes or ovarian tubes (in female) further develop enlarge and start functioning in response to internal secretions from testes and ovaries Enlargement of the sex organs starts with puberty Nocturnal seminal emissions in male and starting of the menstrual cycle in female are the secondary sex characters A number of changes are also observed in extragenital parts In males there is appearance of hair on face and pubic region the skin becomes rough the voice changes and there is tendency to become emotional In females breasts develop there is appearance of hair on the pubic regions and accumulation of sub-cutaneous fat and widening of the pelvis All these are called secondary sex characters These changes are seen after the start of puberty i.e.sexual life In males sexual life starts in between 15-17 years whereas in females it start between 13-15 years in india
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