One fact about most living organisms is that they grow rapidly during the initial stages of their lives. You yourself have been growing taller since you were born. In fact, you will continue growing in height until you are about 18-20 years of age.
How does this happen? When a building grows in height, we know it is because we add more construction material to it. When a human being himself/herself grows in height, what is the mechanism that leads to an increase in height? Let's find out!