Labels:book | bulletin board | hakham | person | plaything | sky OCR: PHYSICAL GROWTH OUR BODY GROWS. changing in size and shape until you reach the female age of about 18 or the male age of 22 There are two main periods particularly rapid grow th: one in the first year. the next in about year 12 in girls and vear 14 in boys. Different parts of the body grow at uneven rates. By year six. for example, the brain 90 percent of its adult size while the legs have only reached half their full length. THREE YEARS Upright posture and Longer legs arms The growth rate much slower in the third year compared with the first year The child's arms and legs have grown faster usually than very thel slightly head. Boys of and this age are the Strong legs taller heavier average height being 90 cm (3 feet) IN The advancing 1YEAR 3 YEARS G YEARS 14 YEARS 20YEARS stages growth YO ...