The nervous system is a complex network of specialized tissues that regulates thoughts, emotions, actions, sensations, and body functions. It has two major divisions: the central nervous system and the peripheral nervous system.
WHAT'S INSIDE: HUMAN BODY
- Body Parts
- Body Systems
The heart is one of the strongest muscles in the body. Learn about this extremely vital part of the body.
When it comes to your body, how much do you know? Test your knowledge with this quiz adapted from "YOU: The Owner's Manual", by Dr. Mehmet Oz and Dr. Michael Roizen.