Biological factors that have great influence on preschool children's health. The characteristics, potentials, trends and limits of children's growth and development are all influenced by the genetic factors of both parents, and the genetic information of race and family has far-reaching influence.
There are also some physical factors, such as the cold and hot climate, the sudden change of air humidity, air pressure or airflow, ionizing radiation, noise and other changes will affect the health of preschool children.