(a) Define Puberty. List any two changes seen in boys at the time of puberty. (b) Why are testes in human…
(a) Define Puberty. List any two changes seen in boys at the time of puberty.
(b) Why are testes in human males located outside the abdominal cavity in scrotum ?
(c) List any three techniques of contraception used by humans. Which one of these is not meant for males ?
Solution
(a) When the rate of general body growth begins to slow down and reproduction tissues begin to mature – This period of adolescence is called puberty.
Changes in boys: Cracking of voice/Thick hair growth on face / Penis occasionally begins to become enlarge and erect /Thick hair growing in the genital area or arm pits. (Any two)
(b) As sperm formation requires a temperature which is lower than normal body temperature, that is why testes are located outside the abdominal cavity in scortum.
(c) Three techniques of contraception:
Mechanical barrier /Condom
Chemical method /Oral pills
Loop or copper T inside uterus
Surgical methods /Blockage of Vas deferens or fallopian tube
(Any three)
Not meant for males: Oral pills / Loop or Copper T