During this period, children's growth rate is slower than that of infancy, but due to the increase of range of activities and contact with surrounding things, their intelligence development is obviously faster than before, and their language, thinking and communication skills are enhanced. Its diet changed from milk to rice, and gradually changed to adult diet. Autoimmunity is still not perfect, so we should pay attention to preventing infectious diseases.
2. Children: from the age of 3 to the pre-school stage.
During this period, the growth rate of children further slowed down and reached steady growth. They gain about 2 kilograms in weight and 5 centimeters in height every year, while their intellectual development is more perfect and curious. My knowledge has expanded, I can do more complicated movements, and I have certain self-care ability, such as dressing and eating. My language and thinking ability have been further developed and have great plasticity.
3. Middle-aged children: from 6 years old to adolescence.
During this period, children's physical development grew steadily, and the development of other systems and organs was close to that of adults except reproductive system. The morphological development of the brain is basically completed, the intellectual development is further mature, and the ability of understanding, analysis, synthesis and inhibition is obviously developed, which is an important period for receiving scientific and cultural education.
Extended data:
Standard height of different age groups
There is a formula to calculate the height of a child. The formula for calculating the height of 2- 12 years old is: height (cm)= age ×7+70(cm)=4×7+70=98(cm). Generally speaking, the development of boys and girls is different. At some stages, boys grow faster than girls, while at other stages, girls grow faster than boys.
Children's height is not only influenced by parents' genes, but also by factors such as nutrition, sleep, exercise and growth environment. Children will inherit 30% of their parents' genes. A common saying is "the father is short and the mother is short."