Q91 of 130 Page 184

What changes take place in girls during puberty?

Changes which occur in girls during puberty are:

(i) Rapid increase in height.

(ii) The region below the waist becomes wider.

(iii) Hair grow in armpits and in pubic regions between the thighs.

(iv) The ovary enlarges and starts producing matured eggs.

(v) Menstruation begins.

(vi) Have high pitched voice.

(vii) Development and enlargement of breast.

State the various ways in which early marriage and motherhood is harmful to the girls.

What changes take place in boys during puberty?

What is meant by the ‘primary sexual characteristics’ in humans? State two primary sexual characteristics in boys and two in girls.

What is meant by ‘secondary sexual characteristics’ in humans? Explain with the help of two examples.