Boys may experience enlargement of the testes and penis around 12 years also. There is tremendous variation as to when sexual changes occur and how rapidly they take place. Girls are usually taller and proportionately heavier than boys. Boys are growing rapidly and have a more noticeable voice change than girls. The typical middle school student craves food since most of the students nutrients are used due to the rapid growth of body organs.
Excessive perspiration occurs and sweat glands become active.
The appearance of acne may cause students to feel sesitive towards their appearance. Endurance is not usually high due to the rapid growth spurt. Heart and circulatory systems develop more slowly than bones and muscles. Extreme restlessness and alternating periods of near hyperactivity and fatigue reflect variations in basal metabolic rates. Our Observations . . .