Question

a)State the reasons for the following:
i)Testes in male humans are located outside their body
ii)Changes are seen in boys and girls during the time of puberty
iii)People adopt contraceptive methods
b)Explain the following terms in brief:
i)Implantation
ii)Menstruation

Answer 1

a)
i)because it need less temperature according to our body temperature so it is located outside the body in muscular bag called scrotum
ii) because both are sexually mature at the time of puberty
III) because it prevent on fertilization of ova or egg cell with sperms
b)
I) the process of plantation of embryo in uterus wall known as implantation
ii) the process in which the uterus wall and ova exit in vegina with blood known as mensuration