Health Topics, A-Z
Overview of Blood and Blood Components
Human blood consists of about 22 percent solids and 78 percent water. The components of blood are plasma, fat globules, chemicals, and gases.
Overview of Diagnostic Tests for Nervous System Disorders in Children
Evaluating and diagnosing damage to the nervous system can be complicated. Many of the same symptoms occur in different combinations among the different disorders, and many disorders do not have definitive causes, markers, or tests.