PSYCHOLOGY
,CNS AND NEURONS
,3.1.1 The central nervous system (CNS)
BASIC BRAIN FACTS
- The human brain weighs about 3.3 pounds (1.5
kilograms)
- IT makes up about 2% of a human's body
weight
- It contains about 86 billion nerve cells
(neurons) - the "grey matter" - and billions of
nerve fibers (axons and dendrites) - the "white
matter". These are connected by trillions of
connections, or synapses
, 3.1.1 The central nervous system (CNS)
WHAT IS THE DIFFERENCE BETWEEN THE
CNS (central nervous system) AND PNS
(peripheral nervous system) ??