Why some young boys and girls get acnes and pimples on their face?
The acne and pimples are due to the increased activity of the sebaceous or oil glands during puberty. During adolescence the sweat glands and oil glands become more active. The sebacious glands secrete more oil resulting in the growth of acne and pimples.
What changes occur in the voice of boys and girls during puberty?
How are general growth and sexual maturation different from each other?
How do humans attain sexual maturity during puberty?
What are secondary sexual characters?
