The nervous system consists of the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord, while the PNS contains nerves that connect the CNS to sensory organs and other parts of the body. The PNS can be further divided into the somatic nervous system, which controls voluntary movements, and the autonomic nervous system, which regulates involuntary functions like digestion. The autonomic nervous system has two divisions - the sympathetic and parasympathetic systems - that work in opposition to activate the body during stress or rest.

4. The nervous system consists of the brain,
spinal cord, sensory organs, and all of the
nerves that connect these organs with the
rest of the body. Together, these organs are
responsible for the control of the body and
communication among its parts.

5. 2 COMPONENTS
CNS (CENTRAL
NERVOUS SYSTEM)
PNS (PERIPHERAL
NERVOUS SYSTEM)
STRUCTURALLY:

6. 2 COMPONENTS
SOMATIC/VOLUNTAR
Y
AUTONOMIC/
INVOLUNTARY
PNS subdivided into:

7.  BRAIN
 SPINAL CORD
 NERVES

8.  Sensory Neurons
 Ganglia
 Nerves that connects to one another and to
the CNS.

9.  Part of the peripheral nervous system.
Major functions of the somatic nervous
system include voluntary movements of
the muscles and organs and reflex
movements. In the process of voluntary
movement, sensory neurons carry impulses
to the brain and spinal cord.

12.  Regulates the functions of our internal
organs (the viscera) such as the heart,
stomach and intestines. The ANS is part of
the peripheral nervous system and it also
controls some of the muscles within the
body. Autonomic division of the nervous
system can be subdivided into
Parasympathetic and Sympathetic

14. Sympathetic Parasympathetic
-Decreases heart rate,
bronchiole dilation,
blood glucose, blood to
skeletal muscle.
-Increases digestion,
pupil size, urinary
output.
-“rest and digest”
-Decreases digestion,
pupil size, urinary
output.
-Increases heart rate,
bronchiole dilation,
blood glucose, blood to
skeletal muscle
.
-“fight or flight”