The following are the secondary sex characteristics of boys.
1. Hair – Immediately after the development of primary sex characteristics, pubic hair appears followed by axillary and facial hair.
2. Skin – The skin becomes coarse and the pores in the skin enlarge.
3. Glands – The oil producing glands in the skin enlarge and due to this acne may appear of the faces.
4. Muscle – The strength of the muscle increases and it gives shape to arms, legs and shoulders.
5. Voice – During this period voice changes occur and the voice becomes husky. Then its pitch drops and the volume increases.
