Human Body Systems: Enzymes, Electrolytes & Metabolism

Body systems rely on a balance of electrolytes, enzymes, and hormones like cortisol. Understand fat metabolism, urinary output, and energy system functions.

10 Major Types of Diseases

Published Aug,14 2017 | By Diane Helentjaris

More than 2,000 years ago, the Greek doctor Hippocrates began categorizing diseases in a scientific way. This practice continues into modern times. The World Health Organization's current disease classification system can be summarized in 10 broad areas.