Motor Development A. Affected by changes in nervous system. B. Gross motor skills generally mature sooner than fine motor. Health and Illness A. Mortality. B. Nonfatal Illnesses and Accidents. Young children have 6-9 brief illnesses per year.
Adolescents have more deaths from accidents.
Higher rates of risky behavior. Alcohol and drug use. Risky behavior in context. Explanations of Physical Development A. Maturation. C. Environmental Effects.