(1) Testosterone
(2) Thyroid
(3) Adam's apple, Adolescence
(4) Endocrine
(5) Target sites
(6) Larynx
(7) Pituitary, Puberty
(8) Hormone
(9) Insulin
(10) Estrogen.

Height of a child depends upon the genes inherited from parents. However, there are some other factors also that can affect height. These factors include balanced diet, hormones, exercise, diseases. Balanced diet is essential for the adolescents as it helps the bones, muscles and other parts of the body to get adequate nourishment for growth.
Similarly, lack of hormones as growth hormones may lead to dwarfism. Regular exercise is also essential for proper development lack of disease is a priority for proper growth that is related to other factors listed above. Thus, height depends on combination of various factors.

(a) Pituitary gland It releases hormones that control the release of sex hormones, i.e. testosterone in males and oestrogen in females.
(b) Testis It releases testosterone which is responsible for the secondary sexual character in boys.
(c) Pancreas It releases insulin which prevents diabetes.
(d) Adrenal gland It releases aldosterone that maintains the correct salt balance in the blood

Body changes during adolescence are given below

We conclude that initially, girls grow faster than boys but by about 18 years of age, both reach at their maximum height. The rate of growth in height varies in different individuals.

(a) Adam's apple The protruding part of the growing voice box is called Adam's apple in males. In boys, voice box (larynx) develops larger than girls and this protruding part is seen as bulge in the neck area.
(b) Secondary sexual characters The physical features that help to distinguish the males from the females are called secondary sexual characters. These characters develop at the time of puberty. The secondary sexual characteristics in humans are given below:
In males,
(i) Growth of pubic hair, beard and moustaches.
(ii) Hair on chest and underarms.
In females,
(i) Enlargement of breasts.
(ii) Appearance of pubic hair, hair under arms.
(c) Sex determination of the unborn baby Sex of the unborn baby is determined by the sex chromosomes, i.e. X and Y. A female has two X-chromosomes, while a male have one X and one Y-chromosome.
So in females, the gamete, i.e. egg have only one X-chromosome but in males, the sperm, i.e. male gamete may have an X-chromosome or V-chromosome. If the egg fertilises with sperm containing X-chromosome, the zygote will develop into a female (XX) and if the egg fertilises with sperm containing V-chromosome, the zygote will develop into a male (XY).