Refer to the following distribution of ages: 
What is the class interval?
Definitions:
Central Nervous System
This refers to the part of the nervous system consisting of the brain and the spinal cord, responsible for processing and transmitting neural signals.
Stress-Related Networks
Systems or pathways within the body or mind that are activated or affected by stress, impacting health and behavior.
Fetal Alcohol Syndrome
A condition in a child that results from alcohol exposure during the mother's pregnancy, causing growth problems, facial anomalies, and cognitive deficits.
Hemophilia
A genetic disorder that impairs the body's ability to make blood clots, leading to excessive bleeding.
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