(a) What changes take place in boys during puberty?

(b) What changes take place in girls during puberty?

In Males
1. Growth of thick hair appears on face armpits, face, chest and around the pubic area. Hair also grows on the legs.
2. Testosterone secretion is started.
3. Voice changes i.e. get cracked.
4. Height increases rapidly for a few months.

In Females
1. Secretion of oestrogen starts.
2. Start of the menstrual cycle.
3. Enlargement of breasts.
4. Hair growth around pubic area and on the armpits.